Literature DB >> 27006792

Crystal structure of 2-[chloro-(4-meth-oxy-phen-yl)meth-yl]-2-(4-meth-oxy-phen-yl)-5,5-di-methyl-cyclo-hexane-1,3-dione.

Saloua Chelli1, Konstantin Troshin1, Sami Lakhdar1, Herbert Mayr1, Peter Mayer1.   

Abstract

In the title compound, C23H25ClO4, the cyclo-hexane ring adopts a chair conformation with the 4-meth-oxy-phenyl substituent in an axial position and the chloro-(4-meth-oxy-phen-yl)methyl substituent in an equatorial position. The packing features inversion dimers formed by pairs of C-H⋯O contacts and strands along [100] and [010] established by further C-H⋯O and C-H⋯Cl contacts, respectively.

Entities:  

Keywords:  crystal structure; weak C—H⋯O and C—H⋯Cl inter­actions

Year:  2016        PMID: 27006792      PMCID: PMC4778832          DOI: 10.1107/S2056989016002085

Source DB:  PubMed          Journal:  Acta Crystallogr E Crystallogr Commun


Chemical context

Iodo­nium ylides, a subclass of hypervalent iodine compounds (Zhdankin & Stang, 2008 ▸), have a variety of synthetic applications due to their versatile reactivity pattern. The known transformations of these reagents include decomposition (Moriarty et al., 2008 ▸; Lee & Jung, 2002 ▸) in various solvents, transylidation reactions (Hadjiarapoglou & Varvoglis, 1988 ▸), C–H insertion reactions (Adam et al., 2003 ▸; Batsila et al., 2003 ▸) and intra- and inter­molecular cyclo­addition reactions under photochemical, thermal, or metal-catalysed activation (Goudreau et al., 2009 ▸). During our studies on the reactions of iodo­nium ylides with stabilized carbenium ions, we obtained the title compound, the structure of which provides valuable information on the mechanism of these reactions that will be discussed in a separate paper.

Structural commentary

The title compound (Fig. 1 ▸) comprises three six-membered rings: two benzene rings and a cyclo­hexane ring adopting a chair-conformation, with puckering amplitude Q = 0.5247 (19) Å and θ = 167.6 (2)° (Boeyens, 1978 ▸; Cremer & Pople, 1975 ▸). The maximum deviation from the mean plane is 0.269 (2) Å for atom C5. The 4-meth­oxy­phenyl substituent is in an axial position, while the chloro­(4-meth­oxy­phen­yl)methyl substituent is in an equatorial position. As expected, the two keto-C atoms are substituted in a trigonal–planar fashion. The C1—Cl1 bond is almost parallel to the axial C5—C8 bond (methyl substituent) with a C8—C5—C1—Cl1 torsion angle of −5.88 (11)°. The methyl C16 and the meth­oxy C23 carbon atoms have maximum deviations from the respective benzene rings, C10–C16 and C17–C22, of 0.085 (2) and 0.057 (2) Å, respectively, and hence are almost coplanar with them. The two benzene rings are inclined to one another by 41.38 (6)° and to the mean plane of the cyclohexane ring by 75.27 (9) and 43.40 (8)°, respectively.
Figure 1

The mol­ecular structure of the title compound. Displacement ellipsoids are drawn at the 50% probability level.

Supra­molecular features

The packing of the title compound manifests weak C—H⋯O and C—H⋯Cl contacts (Table 1 ▸), while π-stacking and C—H⋯π inter­actions are not present. Pairs of contacts of the type C14—H14O2 between the benzene ring and a keto-group lead to the formation of inversion dimers with an (14) ring motif (Fig. 2 ▸). Strands along [010] are established by weak C8–H8C⋯Cl1 contacts between the axial-oriented methyl substituent of the cyclo­hexane ring and the chloro substituent (Fig. 3 ▸). Finally, strands along [100] are formed by C19—H19⋯O3 contacts between the benzene ring (C17–C22) and the methoxy group on benzene ring C10–C16 (Fig. 4 ▸). The full packing including cell outlines is shown in Fig. 5 ▸.
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A D—HH⋯A DA D—H⋯A
C8—H8C⋯Cl1i 0.982.813.745 (2)159
C14—H14⋯O2ii 0.952.523.394 (2)153
C19—H19⋯O3iii 0.952.563.470 (2)161

Symmetry codes: (i) ; (ii) ; (iii) .

Figure 2

A view of the inversion dimer formed by a pair of weak C—H⋯O contacts (blue dotted lines).

Figure 3

A view of the strands along [010] formed by weak C—H⋯Cl contacts (orange dotted lines).

Figure 4

A view along [010] of the strands along [100] formed by weak C—H⋯O contacts (green dotted lines).

Figure 5

Packing diagram of the title compound viewed along [010]. For clarity, all the weak inter­actions have been omitted.

Database survey

A CSD database (Version 5.36; Groom & Allen, 2014 ▸) search has been conducted for the three structure fragments A, B and C depicted in the following scheme. The search for fragment A yielded 21 hits; however, in 20 of them the cyclo­hexane ring is part of an annulated ring system and in the remaining hit it is part of a spiro-compound. Since none of the hits is really closely related to the title compound, they are not cited in detail. The search for fragment B led to six hits with the CSD refcodes CBZPOX (Noordik & Cillissen, 1981 ▸), IYISAL (Sparr & Gilmour, 2011 ▸), PAQKAV (Nair et al., 2012 ▸), POMZOH (Unruh et al., 2008 ▸), UREKEI (Betz et al., 2011 ▸) and YUZPOZ (Kalyani et al., 2010 ▸). Finally, the search for fragment C comprising the 5,5-di­methyl­cyclo­hexane-1,3-dione moiety produced 25 hits. In merely two of them fragment C is part of a non-spiro compound comparable to the title compound: CSD refcodes CETMCD (Roques et al., 1976 ▸) and FAWDEM (Ochiai et al., 1986 ▸).

Synthesis and crystallization

Zinc chloride (114.2 mg, 699 µmol), tetra­butyl­ammonium chloride (190.2 mg, 684 µmol), diethyl ether (0.10 ml) and phenyl­iodo­nium-4,4-di­methyl­cyclo­hexane-2,6-dione (568.6 mg, 1.66 mmol) were dissolved in di­chloro­methane (6 ml) and cooled to 195 K. Then 4,4′-di­meth­oxy­benzhydryl chloride (417.2 mg, 1.59 mmol) in di­chloro­methane (4 ml) was added dropwise. The reaction solution was stirred at 195 K for 2 h. The resulting mixture was quenched with 2 M aqueous ammonia. Diethyl ether was added to the organic phase followed by washing with water and brine, drying (MgSO4), and evaporation of the solvents in a vacuum. The crude product was recrystallized from diethyl ether/pentane (1:1 v/v) affording the title compound (394 mg, 982 µmol; yield 62%).

Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2 ▸. All H atoms were positioned geometrically (C—H = 0.98 Å for methyl-H, 0.99 Å for CH2, 1.00 Å for aliphatic C—H, 0.95 Å for aromatic H) and treated as riding on their parent atoms, with U iso(H) = 1.2U eq(C) or 1.5Ueq(C) for methyl H atoms. The methyl groups were allowed to rotate along the CC bonds to best fit the experimental electron density.
Table 2

Experimental details

Crystal data
Chemical formulaC23H25ClO4
M r 400.88
Crystal system, space groupMonoclinic, P21/n
Temperature (K)100
a, b, c (Å)10.0235 (5), 11.1997 (6), 19.0655 (12)
β (°)100.429 (6)
V3)2104.9 (2)
Z 4
Radiation typeMo Kα
μ (mm−1)0.21
Crystal size (mm)0.40 × 0.32 × 0.22
 
Data collection
DiffractometerOxford Diffraction XCalibur3
Absorption correctionMulti-scan (CrysAlis PRO; Agilent, 2014)
T min, T max 0.982, 1.000
No. of measured, independent and observed [I > 2σ(I)] reflections11293, 4283, 3355
R int 0.031
(sin θ/λ)max−1)0.625
 
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S 0.040, 0.102, 1.03
No. of reflections4283
No. of parameters257
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å−3)0.27, −0.30

Computer programs: CrysAlis PRO (Agilent, 2014 ▸), SIR97 (Altomare et al., 1999 ▸), SHELXL2014 (Sheldrick, 2015 ▸), ORTEPIII (Burnett & Johnson, 1996 ▸) and PLATON (Spek, 2009 ▸).

Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S2056989016002085/rz5184sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989016002085/rz5184Isup2.hkl Click here for additional data file. Supporting information file. DOI: 10.1107/S2056989016002085/rz5184Isup3.cml CCDC reference: 1451618 Additional supporting information: crystallographic information; 3D view; checkCIF report
C23H25ClO4F(000) = 848
Mr = 400.88Dx = 1.265 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71069 Å
a = 10.0235 (5) ÅCell parameters from 3451 reflections
b = 11.1997 (6) Åθ = 4.4–28.5°
c = 19.0655 (12) ŵ = 0.21 mm1
β = 100.429 (6)°T = 100 K
V = 2104.9 (2) Å3Block, colourless
Z = 40.40 × 0.32 × 0.22 mm
Oxford Diffraction XCalibur3 diffractometer4283 independent reflections
Radiation source: fine-focus sealed tube3355 reflections with I > 2σ(I)
Detector resolution: 15.9809 pixels mm-1Rint = 0.031
ω scansθmax = 26.4°, θmin = 4.2°
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2014)h = −12→9
Tmin = 0.982, Tmax = 1.000k = −13→13
11293 measured reflectionsl = −23→22
Refinement on F20 restraints
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.040H-atom parameters constrained
wR(F2) = 0.102w = 1/[σ2(Fo2) + (0.0382P)2 + 0.9962P] where P = (Fo2 + 2Fc2)/3
S = 1.02(Δ/σ)max < 0.001
4283 reflectionsΔρmax = 0.27 e Å3
257 parametersΔρmin = −0.30 e Å3
Experimental. Absorption correction: CrysAlis PRO (Agilent, 2014), Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm.
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
xyzUiso*/Ueq
Cl1−0.20291 (4)0.62036 (4)0.34454 (3)0.03325 (14)
O10.08165 (13)0.59745 (11)0.29198 (7)0.0321 (3)
C1−0.04506 (17)0.66193 (15)0.40194 (9)0.0251 (4)
H10.01440.58980.40470.030*
O2−0.16483 (12)0.88985 (11)0.36243 (6)0.0272 (3)
C20.02730 (16)0.75977 (14)0.36481 (9)0.0216 (4)
O30.49570 (12)0.88680 (11)0.56782 (6)0.0280 (3)
C30.07764 (16)0.70477 (16)0.29949 (9)0.0245 (4)
O4−0.10111 (12)0.75401 (12)0.68822 (7)0.0326 (3)
C40.12691 (17)0.79029 (17)0.24936 (10)0.0281 (4)
H4A0.14720.74570.20770.034*
H4B0.21210.82790.27380.034*
C50.02225 (17)0.88830 (15)0.22329 (9)0.0251 (4)
C6−0.01011 (17)0.95395 (15)0.28892 (9)0.0248 (4)
H6A0.07270.99480.31370.030*
H6B−0.07971.01570.27310.030*
C7−0.06089 (16)0.87099 (15)0.34059 (9)0.0218 (3)
C8−0.10614 (18)0.83159 (17)0.18100 (10)0.0301 (4)
H8A−0.14370.77490.21150.045*
H8B−0.08390.78940.13960.045*
H8C−0.17320.89400.16480.045*
C90.0821 (2)0.97616 (18)0.17590 (10)0.0355 (5)
H9A0.01551.03870.15930.053*
H9B0.10500.93360.13480.053*
H9C0.16431.01250.20330.053*
C100.15436 (16)0.80039 (15)0.41729 (9)0.0215 (3)
C110.27367 (17)0.73249 (15)0.42612 (9)0.0244 (4)
H110.27790.66430.39700.029*
C120.38505 (17)0.76335 (15)0.47659 (9)0.0257 (4)
H120.46540.71670.48180.031*
C130.37996 (16)0.86264 (15)0.51996 (9)0.0225 (4)
C140.26248 (17)0.93041 (15)0.51276 (9)0.0237 (4)
H140.25800.99780.54250.028*
C150.15099 (17)0.89837 (15)0.46128 (9)0.0235 (4)
H150.07060.94490.45620.028*
C160.48994 (18)0.98232 (17)0.61706 (10)0.0308 (4)
H16A0.47061.05740.59080.046*
H16B0.57720.98870.64970.046*
H16C0.41800.96630.64440.046*
C17−0.06513 (16)0.68527 (15)0.47733 (9)0.0246 (4)
C18−0.17687 (17)0.74582 (16)0.49528 (10)0.0291 (4)
H18−0.24720.77290.45850.035*
C19−0.18604 (18)0.76657 (17)0.56548 (10)0.0312 (4)
H19−0.26250.80760.57660.037*
C20−0.08395 (17)0.72774 (15)0.62008 (10)0.0261 (4)
C210.02565 (17)0.66535 (15)0.60393 (10)0.0266 (4)
H210.09460.63670.64090.032*
C220.03362 (17)0.64505 (15)0.53272 (10)0.0261 (4)
H220.10910.60230.52180.031*
C23−0.00265 (19)0.70699 (18)0.74517 (10)0.0340 (4)
H23A−0.00060.61980.74150.051*
H23B−0.02680.72960.79090.051*
H23C0.08700.73940.74220.051*
U11U22U33U12U13U23
Cl10.0259 (2)0.0275 (2)0.0429 (3)−0.00490 (17)−0.00321 (18)0.0016 (2)
O10.0347 (7)0.0273 (7)0.0327 (7)0.0070 (5)0.0017 (5)−0.0067 (6)
C10.0197 (8)0.0210 (9)0.0334 (10)0.0007 (6)0.0014 (7)0.0008 (7)
O20.0245 (6)0.0263 (7)0.0330 (7)0.0066 (5)0.0108 (5)0.0034 (5)
C20.0195 (8)0.0191 (8)0.0262 (9)0.0021 (6)0.0043 (7)−0.0014 (7)
O30.0231 (6)0.0311 (7)0.0286 (7)0.0003 (5)0.0014 (5)−0.0054 (5)
C30.0177 (8)0.0268 (9)0.0273 (9)0.0049 (7)−0.0007 (7)−0.0039 (8)
O40.0291 (7)0.0366 (8)0.0349 (7)0.0034 (5)0.0129 (5)0.0039 (6)
C40.0215 (9)0.0349 (10)0.0286 (9)0.0046 (7)0.0068 (7)−0.0031 (8)
C50.0231 (9)0.0252 (9)0.0279 (9)0.0013 (7)0.0074 (7)−0.0001 (7)
C60.0248 (9)0.0213 (9)0.0291 (9)0.0006 (7)0.0066 (7)0.0015 (7)
C70.0222 (8)0.0207 (8)0.0220 (8)0.0000 (7)0.0024 (6)−0.0031 (7)
C80.0292 (10)0.0283 (10)0.0312 (10)0.0038 (7)0.0016 (7)−0.0010 (8)
C90.0350 (11)0.0382 (11)0.0361 (11)−0.0019 (8)0.0138 (8)0.0041 (9)
C100.0208 (8)0.0205 (8)0.0240 (8)−0.0004 (6)0.0064 (6)0.0011 (7)
C110.0260 (9)0.0217 (9)0.0267 (9)0.0038 (7)0.0076 (7)−0.0037 (7)
C120.0203 (8)0.0260 (9)0.0310 (9)0.0041 (7)0.0049 (7)−0.0018 (8)
C130.0219 (8)0.0239 (9)0.0222 (8)−0.0018 (7)0.0050 (6)0.0019 (7)
C140.0269 (9)0.0206 (8)0.0251 (9)0.0006 (7)0.0082 (7)−0.0032 (7)
C150.0213 (8)0.0234 (9)0.0268 (9)0.0034 (7)0.0073 (7)−0.0017 (7)
C160.0308 (10)0.0321 (10)0.0279 (9)−0.0026 (8)0.0015 (7)−0.0053 (8)
C170.0214 (8)0.0194 (8)0.0331 (10)−0.0018 (7)0.0053 (7)0.0044 (7)
C180.0206 (9)0.0298 (10)0.0376 (10)0.0027 (7)0.0069 (7)0.0105 (8)
C190.0231 (9)0.0322 (10)0.0416 (11)0.0072 (7)0.0144 (8)0.0103 (9)
C200.0251 (9)0.0227 (9)0.0329 (10)−0.0024 (7)0.0118 (7)0.0042 (8)
C210.0212 (9)0.0250 (9)0.0334 (10)0.0014 (7)0.0044 (7)0.0054 (8)
C220.0192 (8)0.0230 (9)0.0368 (10)0.0027 (7)0.0068 (7)0.0012 (8)
C230.0340 (10)0.0352 (11)0.0326 (10)−0.0017 (8)0.0058 (8)−0.0014 (9)
Cl1—C11.8140 (17)C9—H9C0.9800
O1—C31.212 (2)C10—C151.385 (2)
C1—C171.510 (2)C10—C111.401 (2)
C1—C21.554 (2)C11—C121.379 (2)
C1—H11.0000C11—H110.9500
O2—C71.209 (2)C12—C131.392 (2)
C2—C101.539 (2)C12—H120.9500
C2—C71.549 (2)C13—C141.387 (2)
C2—C31.553 (2)C14—C151.394 (2)
O3—C131.3669 (19)C14—H140.9500
O3—C161.431 (2)C15—H150.9500
C3—C41.499 (3)C16—H16A0.9800
O4—C201.373 (2)C16—H16B0.9800
O4—C231.429 (2)C16—H16C0.9800
C4—C51.537 (2)C17—C221.385 (2)
C4—H4A0.9900C17—C181.404 (2)
C4—H4B0.9900C18—C191.378 (3)
C5—C81.528 (2)C18—H180.9500
C5—C91.530 (2)C19—C201.391 (3)
C5—C61.536 (2)C19—H190.9500
C6—C71.508 (2)C20—C211.383 (2)
C6—H6A0.9900C21—C221.393 (2)
C6—H6B0.9900C21—H210.9500
C8—H8A0.9800C22—H220.9500
C8—H8B0.9800C23—H23A0.9800
C8—H8C0.9800C23—H23B0.9800
C9—H9A0.9800C23—H23C0.9800
C9—H9B0.9800
C17—C1—C2117.73 (14)H9B—C9—H9C109.5
C17—C1—Cl1111.52 (12)C15—C10—C11118.09 (15)
C2—C1—Cl1109.52 (11)C15—C10—C2121.31 (14)
C17—C1—H1105.7C11—C10—C2120.36 (15)
C2—C1—H1105.7C12—C11—C10120.88 (16)
Cl1—C1—H1105.7C12—C11—H11119.6
C10—C2—C7108.45 (13)C10—C11—H11119.6
C10—C2—C3106.72 (12)C11—C12—C13120.16 (15)
C7—C2—C3109.30 (13)C11—C12—H12119.9
C10—C2—C1108.18 (13)C13—C12—H12119.9
C7—C2—C1114.51 (13)O3—C13—C14124.10 (15)
C3—C2—C1109.38 (13)O3—C13—C12115.89 (15)
C13—O3—C16117.10 (13)C14—C13—C12120.01 (15)
O1—C3—C4122.46 (16)C13—C14—C15119.14 (16)
O1—C3—C2120.70 (16)C13—C14—H14120.4
C4—C3—C2116.77 (14)C15—C14—H14120.4
C20—O4—C23116.90 (14)C10—C15—C14121.72 (15)
C3—C4—C5112.22 (14)C10—C15—H15119.1
C3—C4—H4A109.2C14—C15—H15119.1
C5—C4—H4A109.2O3—C16—H16A109.5
C3—C4—H4B109.2O3—C16—H16B109.5
C5—C4—H4B109.2H16A—C16—H16B109.5
H4A—C4—H4B107.9O3—C16—H16C109.5
C8—C5—C9109.80 (15)H16A—C16—H16C109.5
C8—C5—C6110.31 (14)H16B—C16—H16C109.5
C9—C5—C6109.66 (14)C22—C17—C18117.57 (17)
C8—C5—C4109.52 (14)C22—C17—C1117.99 (15)
C9—C5—C4109.41 (14)C18—C17—C1124.43 (16)
C6—C5—C4108.10 (14)C19—C18—C17120.98 (17)
C7—C6—C5112.54 (14)C19—C18—H18119.5
C7—C6—H6A109.1C17—C18—H18119.5
C5—C6—H6A109.1C18—C19—C20120.32 (16)
C7—C6—H6B109.1C18—C19—H19119.8
C5—C6—H6B109.1C20—C19—H19119.8
H6A—C6—H6B107.8O4—C20—C21124.02 (16)
O2—C7—C6122.10 (15)O4—C20—C19116.11 (15)
O2—C7—C2121.26 (15)C21—C20—C19119.87 (17)
C6—C7—C2116.65 (14)C20—C21—C22119.17 (16)
C5—C8—H8A109.5C20—C21—H21120.4
C5—C8—H8B109.5C22—C21—H21120.4
H8A—C8—H8B109.5C17—C22—C21122.05 (16)
C5—C8—H8C109.5C17—C22—H22119.0
H8A—C8—H8C109.5C21—C22—H22119.0
H8B—C8—H8C109.5O4—C23—H23A109.5
C5—C9—H9A109.5O4—C23—H23B109.5
C5—C9—H9B109.5H23A—C23—H23B109.5
H9A—C9—H9B109.5O4—C23—H23C109.5
C5—C9—H9C109.5H23A—C23—H23C109.5
H9A—C9—H9C109.5H23B—C23—H23C109.5
C17—C1—C2—C1046.58 (18)C7—C2—C10—C11−154.85 (15)
Cl1—C1—C2—C10175.35 (11)C3—C2—C10—C11−37.2 (2)
C17—C1—C2—C7−74.47 (19)C1—C2—C10—C1180.41 (18)
Cl1—C1—C2—C754.29 (16)C15—C10—C11—C12−0.8 (2)
C17—C1—C2—C3162.47 (14)C2—C10—C11—C12−175.36 (16)
Cl1—C1—C2—C3−68.77 (14)C10—C11—C12—C130.4 (3)
C10—C2—C3—O1102.75 (17)C16—O3—C13—C145.3 (2)
C7—C2—C3—O1−140.15 (16)C16—O3—C13—C12−174.99 (15)
C1—C2—C3—O1−14.1 (2)C11—C12—C13—O3−179.34 (15)
C10—C2—C3—C4−74.16 (17)C11—C12—C13—C140.3 (3)
C7—C2—C3—C442.94 (18)O3—C13—C14—C15179.02 (15)
C1—C2—C3—C4169.04 (13)C12—C13—C14—C15−0.6 (2)
O1—C3—C4—C5130.01 (17)C11—C10—C15—C140.5 (2)
C2—C3—C4—C5−53.14 (19)C2—C10—C15—C14175.01 (15)
C3—C4—C5—C8−62.80 (19)C13—C14—C15—C100.2 (3)
C3—C4—C5—C9176.80 (15)C2—C1—C17—C22−92.21 (19)
C3—C4—C5—C657.43 (18)Cl1—C1—C17—C22139.97 (14)
C8—C5—C6—C762.78 (18)C2—C1—C17—C1887.3 (2)
C9—C5—C6—C7−176.16 (14)Cl1—C1—C17—C18−40.5 (2)
C4—C5—C6—C7−56.94 (18)C22—C17—C18—C191.4 (3)
C5—C6—C7—O2−128.13 (17)C1—C17—C18—C19−178.16 (16)
C5—C6—C7—C252.09 (19)C17—C18—C19—C200.1 (3)
C10—C2—C7—O2−106.02 (17)C23—O4—C20—C21−3.9 (2)
C3—C2—C7—O2137.99 (16)C23—O4—C20—C19175.34 (16)
C1—C2—C7—O214.9 (2)C18—C19—C20—O4179.10 (16)
C10—C2—C7—C673.77 (18)C18—C19—C20—C21−1.6 (3)
C3—C2—C7—C6−42.22 (19)O4—C20—C21—C22−179.16 (16)
C1—C2—C7—C6−165.33 (14)C19—C20—C21—C221.7 (3)
C7—C2—C10—C1530.8 (2)C18—C17—C22—C21−1.4 (3)
C3—C2—C10—C15148.44 (15)C1—C17—C22—C21178.20 (16)
C1—C2—C10—C15−93.96 (18)C20—C21—C22—C17−0.1 (3)
D—H···AD—HH···AD···AD—H···A
C8—H8C···Cl1i0.982.813.745 (2)159
C14—H14···O2ii0.952.523.394 (2)153
C19—H19···O3iii0.952.563.470 (2)161
  10 in total

Review 1.  Chemistry of polyvalent iodine.

Authors:  Viktor V Zhdankin; Peter J Stang
Journal:  Chem Rev       Date:  2008-12       Impact factor: 60.622

2.  The Cambridge Structural Database in retrospect and prospect.

Authors:  Colin R Groom; Frank H Allen
Journal:  Angew Chem Int Ed Engl       Date:  2014-01-02       Impact factor: 15.336

3.  Cyclopropyl iminium activation: reactivity umpolung in enantioselective organocatalytic reaction design.

Authors:  Christof Sparr; Ryan Gilmour
Journal:  Angew Chem Int Ed Engl       Date:  2011-07-22       Impact factor: 15.336

4.  Alkenyl C-H insertion of iodonium ylides into pyrroles: studies toward the total syntheses of tolmetin and amtolmetin guacil.

Authors:  Christina Batsila; Efstathios P Gogonas; George Kostakis; Lazaros P Hadjiarapoglou
Journal:  Org Lett       Date:  2003-05-01       Impact factor: 6.005

5.  Palladium-catalyzed oxidative arylhalogenation of alkenes: synthetic scope and mechanistic insights.

Authors:  Dipannita Kalyani; Andrew D Satterfield; Melanie S Sanford
Journal:  J Am Chem Soc       Date:  2010-06-23       Impact factor: 15.419

6.  The mechanism of 1,4 alkyl group migration in hypervalent halonium ylides: the stereochemical course.

Authors:  Robert M Moriarty; Sachin Tyagi; Daniela Ivanov; Mircea Constantinescu
Journal:  J Am Chem Soc       Date:  2008-05-21       Impact factor: 15.419

7.  General method for the synthesis of phenyliodonium ylides from malonate esters: easy access to 1,1-cyclopropane diesters.

Authors:  Sébastien R Goudreau; David Marcoux; André B Charette
Journal:  J Org Chem       Date:  2009-01-02       Impact factor: 4.354

8.  2-Chloro-1,2-diphenyl-ethanone (desyl chloride).

Authors:  Richard Betz; Cedric McCleland; Eric Hosten
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-04-22

9.  Crystal structure refinement with SHELXL.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr C Struct Chem       Date:  2015-01-01       Impact factor: 1.172

10.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  10 in total

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