Literature DB >> 21578099

Tricarbon-yl(η-4',7-dimethoxy-iso-flavone)chromium(0).

Johannes H van Tonder, Barend C B Bezuidenhoudt, J Marthinus Janse van Rensburg.   

Abstract

The metal atom of the Cr(CO)(3) unit of the title compound, [Cr(C(17)H(14)O(4))(CO)(3)], is coordinated to the methoxy-phenyl ring of the isoflavone ligand; the Cr(CO)(3) unit exhibits a three-legged piano-stool conformation. The aromatic ring of the methoxy-phenyl group is twisted by 42.49 (9)° with respect to the γ-pyrone ring. In the fused-ring, the dihedral angle between the phenyl-ene and γ-pyrone rings is 3.08 (13)°.

Entities:  

Year:  2009        PMID: 21578099      PMCID: PMC2971219          DOI: 10.1107/S1600536809040537

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For tricarbon­yl(arene)chromium complexes in regioselective reactions, see: Dominique et al. (1999 ▶). For their photochromic properties, see: Hannesschlager et al. (1999 ▶). For Cr(CO)3 complexation to the aromatic ring of flavanone, see: Dominique et al. (1999 ▶). For Cr(CO)3 complexation to (1,3-dimeth­oxy­benzene), see: Zeller et al. (2004 ▶). For comparison bond distances, see: Allen (2002 ▶). For the synthesis of 4′,7-dimethoxy­isoflavone, see: Thakkar & Cushman (1995 ▶).

Experimental

Crystal data

[Cr(C17H14O4)(CO)3] M = 418.31 Monoclinic, a = 12.3454 (7) Å b = 17.9984 (8) Å c = 7.9988 (4) Å β = 103.733 (2)° V = 1726.50 (15) Å3 Z = 4 Mo Kα radiation μ = 0.71 mm−1 T = 173 K 0.43 × 0.23 × 0.10 mm

Data collection

Bruker APEXII CCD diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2004 ▶) T min = 0.751, T max = 0.933 9320 measured reflections 4145 independent reflections 3393 reflections with I > 2σ(I) R int = 0.027

Refinement

R[F 2 > 2σ(F 2)] = 0.044 wR(F 2) = 0.117 S = 1.08 4145 reflections 255 parameters H-atom parameters constrained Δρmax = 0.86 e Å−3 Δρmin = −0.41 e Å−3 Data collection: APEX2 (Bruker, 2005 ▶); cell refinement: SAINT-Plus (Bruker, 2004 ▶); data reduction: SAINT-Plus; program(s) used to solve structure: SIR97 (Altomare et al., 1999 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: DIAMOND (Brandenburg & Putz, 2005 ▶); software used to prepare material for publication: WinGX (Farrugia, 1999 ▶). Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809040537/ng2656sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536809040537/ng2656Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
[Cr(C17H14O4)(CO)3]F(000) = 856
Mr = 418.31Dx = 1.609 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 3261 reflections
a = 12.3454 (7) Åθ = 2.8–28.3°
b = 17.9984 (8) ŵ = 0.71 mm1
c = 7.9988 (4) ÅT = 173 K
β = 103.733 (2)°Block, yellow
V = 1726.50 (15) Å30.43 × 0.23 × 0.1 mm
Z = 4
Bruker APEXII CCD diffractometer4145 independent reflections
Radiation source: fine-focus sealed tube3393 reflections with I > 2σ(I)
graphiteRint = 0.027
φ and ω scansθmax = 28°, θmin = 1.7°
Absorption correction: multi-scan (SADABS; Bruker, 2004)h = −16→9
Tmin = 0.751, Tmax = 0.933k = −23→21
9320 measured reflectionsl = −10→9
Refinement on F20 restraints
Least-squares matrix: fullH-atom parameters constrained
R[F2 > 2σ(F2)] = 0.044w = 1/[σ2(Fo2) + (0.0453P)2 + 2.2801P] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.117(Δ/σ)max < 0.001
S = 1.08Δρmax = 0.86 e Å3
4145 reflectionsΔρmin = −0.41 e Å3
255 parameters
Experimental. The intensity data was collected on a Bruker Apex II CCD diffractometer using an exposure time of 10 s/frame. The 509 frames were collected with a frame width of 0.5° covering up to θ = 28° with 99.4% completeness accomplished.
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
Cr0.67866 (3)0.08506 (2)0.83271 (5)0.01520 (12)
C71−0.0137 (3)0.34474 (18)0.1743 (5)0.0415 (8)
H71A−0.01770.36060.290.062*
H71B−0.08450.35590.09260.062*
H71C0.04690.37130.14020.062*
C1'0.5514 (2)0.16695 (13)0.8698 (3)0.0170 (5)
C20.4317 (2)0.26583 (14)0.7185 (3)0.0210 (5)
H20.48590.29860.78380.025*
C2'0.6553 (2)0.20306 (14)0.8800 (3)0.0198 (5)
H2'0.65910.24320.80460.024*
C3'0.7524 (2)0.18039 (14)0.9997 (3)0.0212 (5)
H3'0.82080.20581.00660.025*
C30.4495 (2)0.19286 (14)0.7448 (3)0.0185 (5)
C40.3661 (2)0.13983 (14)0.6510 (3)0.0192 (5)
C4'0.7479 (2)0.11970 (14)1.1093 (3)0.0201 (5)
C50.1963 (2)0.13098 (15)0.4082 (4)0.0248 (6)
H50.20220.07840.41260.03*
C5'0.6471 (2)0.08121 (14)1.0971 (3)0.0182 (5)
H5'0.64420.03951.16880.022*
C60.1094 (2)0.16347 (16)0.2927 (4)0.0272 (6)
H60.05670.13360.21560.033*
C6'0.5506 (2)0.10521 (14)0.9775 (3)0.0185 (5)
H6'0.48280.07890.96920.022*
C70.0986 (2)0.24107 (16)0.2887 (4)0.0246 (6)
C80.1774 (2)0.28543 (15)0.3938 (4)0.0241 (6)
H80.17130.3380.38930.029*
C90.2667 (2)0.25058 (14)0.5070 (3)0.0196 (5)
C100.2769 (2)0.17415 (14)0.5204 (3)0.0196 (5)
C110.6772 (2)0.11149 (14)0.6116 (4)0.0224 (5)
C120.8108 (2)0.03640 (15)0.8470 (4)0.0252 (6)
C130.6030 (2)−0.00087 (14)0.7453 (3)0.0213 (5)
C41'0.8552 (3)0.03005 (17)1.2974 (4)0.0326 (7)
H41A0.80720.02771.37880.049*
H41B0.93280.02121.35870.049*
H41C0.8319−0.00791.20820.049*
O10.6770 (2)0.12958 (12)0.4726 (3)0.0362 (5)
O20.89489 (18)0.00706 (14)0.8540 (3)0.0461 (6)
O30.55781 (18)−0.05454 (11)0.6900 (3)0.0318 (5)
O4'0.84603 (16)0.10203 (11)1.2190 (2)0.0260 (4)
O40.36907 (17)0.07292 (10)0.6784 (3)0.0271 (4)
O50.34364 (15)0.29706 (10)0.6077 (2)0.0227 (4)
O70.00685 (17)0.26705 (12)0.1746 (3)0.0347 (5)
U11U22U33U12U13U23
Cr0.0162 (2)0.01354 (19)0.0156 (2)−0.00044 (15)0.00332 (14)0.00014 (15)
C710.0309 (16)0.0381 (18)0.050 (2)0.0135 (14)−0.0004 (15)0.0107 (15)
C1'0.0199 (12)0.0159 (11)0.0154 (11)0.0018 (9)0.0048 (9)−0.0032 (9)
C20.0205 (12)0.0201 (12)0.0211 (12)0.0020 (10)0.0024 (10)0.0009 (10)
C2'0.0242 (13)0.0139 (11)0.0208 (12)−0.0011 (9)0.0047 (10)−0.0009 (9)
C3'0.0204 (12)0.0188 (12)0.0228 (13)−0.0029 (10)0.0020 (10)−0.0026 (10)
C30.0185 (12)0.0199 (12)0.0177 (12)0.0012 (9)0.0058 (10)0.0018 (10)
C40.0187 (12)0.0188 (12)0.0203 (12)0.0014 (9)0.0054 (10)0.0015 (10)
C4'0.0218 (12)0.0192 (12)0.0173 (12)0.0002 (10)0.0007 (10)−0.0037 (10)
C50.0249 (13)0.0200 (13)0.0277 (14)−0.0016 (10)0.0028 (11)0.0021 (11)
C5'0.0272 (13)0.0156 (11)0.0124 (11)0.0003 (10)0.0060 (9)0.0014 (9)
C60.0227 (13)0.0291 (14)0.0268 (14)−0.0044 (11)0.0002 (11)0.0029 (12)
C6'0.0191 (12)0.0193 (12)0.0179 (12)−0.0008 (9)0.0059 (10)−0.0012 (9)
C70.0173 (12)0.0293 (14)0.0269 (14)0.0042 (10)0.0049 (10)0.0086 (11)
C80.0241 (13)0.0209 (13)0.0268 (14)0.0044 (10)0.0049 (11)0.0062 (11)
C90.0187 (12)0.0215 (12)0.0190 (12)0.0012 (10)0.0051 (10)0.0006 (10)
C100.0187 (12)0.0198 (12)0.0209 (12)0.0004 (9)0.0056 (10)0.0027 (10)
C110.0237 (13)0.0178 (12)0.0247 (14)−0.0014 (10)0.0038 (10)−0.0025 (10)
C120.0245 (13)0.0227 (13)0.0260 (14)0.0002 (11)0.0013 (11)−0.0061 (11)
C130.0242 (13)0.0210 (13)0.0199 (12)−0.0013 (10)0.0073 (10)0.0001 (10)
C41'0.0289 (15)0.0312 (15)0.0324 (16)0.0028 (12)−0.0033 (12)0.0096 (13)
O10.0576 (15)0.0321 (11)0.0212 (10)−0.0032 (10)0.0140 (10)0.0037 (9)
O20.0268 (12)0.0449 (14)0.0615 (16)0.0122 (10)0.0002 (11)−0.0138 (12)
O30.0364 (12)0.0229 (10)0.0373 (12)−0.0090 (9)0.0110 (9)−0.0063 (9)
O4'0.0216 (9)0.0258 (10)0.0255 (10)−0.0009 (7)−0.0041 (8)0.0029 (8)
O40.0275 (10)0.0177 (9)0.0312 (11)−0.0030 (7)−0.0030 (8)0.0048 (8)
O50.0232 (9)0.0172 (9)0.0253 (10)0.0024 (7)0.0009 (8)0.0008 (7)
O70.0233 (10)0.0340 (12)0.0410 (13)0.0039 (8)−0.0038 (9)0.0103 (10)
Cr—C111.827 (3)C4—C101.463 (3)
Cr—C121.831 (3)C4'—O4'1.354 (3)
Cr—C131.855 (3)C4'—C5'1.407 (4)
Cr—C2'2.188 (2)C5—C61.369 (4)
Cr—C6'2.200 (2)C5—C101.405 (4)
Cr—C1'2.225 (2)C5—H50.95
Cr—C3'2.231 (3)C5'—C6'1.407 (3)
Cr—C5'2.241 (2)C5'—H5'0.95
Cr—C4'2.262 (2)C6—C71.403 (4)
C71—O71.421 (4)C6—H60.95
C71—H71A0.98C6'—H6'0.95
C71—H71B0.98C7—O71.358 (3)
C71—H71C0.98C7—C81.379 (4)
C1'—C6'1.407 (3)C8—C91.398 (4)
C1'—C2'1.423 (3)C8—H80.95
C1'—C31.484 (3)C9—O51.374 (3)
C2—C31.340 (4)C9—C101.383 (4)
C2—O51.351 (3)C11—O11.158 (3)
C2—H20.95C12—O21.154 (3)
C2'—C3'1.406 (4)C13—O31.150 (3)
C2'—H2'0.95C41'—O4'1.432 (3)
C3'—C4'1.410 (4)C41'—H41A0.98
C3'—H3'0.95C41'—H41B0.98
C3—C41.472 (3)C41'—H41C0.98
C4—O41.223 (3)
C11—Cr—C1289.38 (12)C4'—C3'—Cr72.89 (14)
C11—Cr—C1387.92 (12)C2'—C3'—H3'120.2
C12—Cr—C1389.19 (12)C4'—C3'—H3'120.2
C11—Cr—C2'86.74 (11)Cr—C3'—H3'129.5
C12—Cr—C2'127.26 (11)C2—C3—C4119.1 (2)
C13—Cr—C2'143.03 (11)C2—C3—C1'119.7 (2)
C11—Cr—C6'128.55 (11)C4—C3—C1'121.2 (2)
C12—Cr—C6'141.88 (11)O4—C4—C10121.9 (2)
C13—Cr—C6'88.62 (10)O4—C4—C3124.0 (2)
C2'—Cr—C6'66.94 (10)C10—C4—C3114.0 (2)
C11—Cr—C1'96.39 (11)O4'—C4'—C5'124.7 (2)
C12—Cr—C1'162.83 (11)O4'—C4'—C3'115.1 (2)
C13—Cr—C1'107.12 (10)C5'—C4'—C3'120.2 (2)
C2'—Cr—C1'37.61 (9)O4'—C4'—Cr129.89 (18)
C6'—Cr—C1'37.09 (9)C5'—C4'—Cr70.96 (14)
C11—Cr—C3'106.73 (11)C3'—C4'—Cr70.53 (15)
C12—Cr—C3'95.71 (11)C6—C5—C10121.1 (3)
C13—Cr—C3'164.55 (11)C6—C5—H5119.4
C2'—Cr—C3'37.07 (9)C10—C5—H5119.4
C6'—Cr—C3'78.48 (10)C6'—C5'—C4'119.2 (2)
C1'—Cr—C3'67.15 (9)C6'—C5'—Cr69.97 (14)
C11—Cr—C5'163.24 (11)C4'—C5'—Cr72.62 (14)
C12—Cr—C5'106.15 (11)C6'—C5'—H5'120.4
C13—Cr—C5'98.36 (10)C4'—C5'—H5'120.4
C2'—Cr—C5'78.88 (9)Cr—C5'—H5'129.3
C6'—Cr—C5'36.93 (9)C5—C6—C7119.7 (3)
C1'—Cr—C5'66.93 (9)C5—C6—H6120.2
C3'—Cr—C5'66.21 (9)C7—C6—H6120.2
C11—Cr—C4'142.14 (11)C5'—C6'—C1'122.1 (2)
C12—Cr—C4'86.93 (11)C5'—C6'—Cr73.10 (14)
C13—Cr—C4'129.64 (11)C1'—C6'—Cr72.42 (14)
C2'—Cr—C4'66.30 (9)C5'—C6'—H6'119
C6'—Cr—C4'65.90 (9)C1'—C6'—H6'119
C1'—Cr—C4'78.58 (9)Cr—C6'—H6'127.7
C3'—Cr—C4'36.57 (9)O7—C7—C8124.4 (3)
C5'—Cr—C4'36.43 (9)O7—C7—C6114.7 (3)
O7—C71—H71A109.5C8—C7—C6120.9 (2)
O7—C71—H71B109.5C7—C8—C9117.9 (2)
H71A—C71—H71B109.5C7—C8—H8121
O7—C71—H71C109.5C9—C8—H8121
H71A—C71—H71C109.5O5—C9—C10121.5 (2)
H71B—C71—H71C109.5O5—C9—C8115.8 (2)
C6'—C1'—C2'117.5 (2)C10—C9—C8122.7 (2)
C6'—C1'—C3122.2 (2)C9—C10—C5117.6 (2)
C2'—C1'—C3120.2 (2)C9—C10—C4121.0 (2)
C6'—C1'—Cr70.49 (14)C5—C10—C4121.4 (2)
C2'—C1'—Cr69.80 (14)O1—C11—Cr178.7 (2)
C3—C1'—Cr129.11 (17)O2—C12—Cr178.4 (3)
C3—C2—O5126.0 (2)O3—C13—Cr178.8 (2)
C3—C2—H2117O4'—C41'—H41A109.5
O5—C2—H2117O4'—C41'—H41B109.5
C3'—C2'—C1'121.2 (2)H41A—C41'—H41B109.5
C3'—C2'—Cr73.13 (15)O4'—C41'—H41C109.5
C1'—C2'—Cr72.59 (14)H41A—C41'—H41C109.5
C3'—C2'—H2'119.4H41B—C41'—H41C109.5
C1'—C2'—H2'119.4C4'—O4'—C41'117.5 (2)
Cr—C2'—H2'126.9C2—O5—C9117.9 (2)
C2'—C3'—C4'119.7 (2)C7—O7—C71117.4 (2)
C2'—C3'—Cr69.80 (14)
C11—Cr—C1'—C6'153.08 (16)C5'—Cr—C4'—O4'119.8 (3)
C12—Cr—C1'—C6'−97.9 (4)C11—Cr—C4'—C5'152.16 (18)
C13—Cr—C1'—C6'63.30 (16)C12—Cr—C4'—C5'−122.82 (17)
C2'—Cr—C1'—C6'−130.8 (2)C13—Cr—C4'—C5'−36.4 (2)
C3'—Cr—C1'—C6'−101.42 (16)C2'—Cr—C4'—C5'103.89 (16)
C5'—Cr—C1'—C6'−28.66 (14)C6'—Cr—C4'—C5'29.69 (14)
C4'—Cr—C1'—C6'−64.94 (15)C1'—Cr—C4'—C5'66.45 (15)
C11—Cr—C1'—C2'−76.17 (16)C3'—Cr—C4'—C5'133.3 (2)
C12—Cr—C1'—C2'32.8 (4)C11—Cr—C4'—C3'18.8 (2)
C13—Cr—C1'—C2'−165.95 (15)C12—Cr—C4'—C3'103.85 (17)
C6'—Cr—C1'—C2'130.8 (2)C13—Cr—C4'—C3'−169.74 (16)
C3'—Cr—C1'—C2'29.33 (15)C2'—Cr—C4'—C3'−29.44 (15)
C5'—Cr—C1'—C2'102.09 (16)C6'—Cr—C4'—C3'−103.64 (17)
C4'—Cr—C1'—C2'65.82 (15)C1'—Cr—C4'—C3'−66.88 (16)
C11—Cr—C1'—C336.9 (2)C5'—Cr—C4'—C3'−133.3 (2)
C12—Cr—C1'—C3145.9 (4)O4'—C4'—C5'—C6'−180.0 (2)
C13—Cr—C1'—C3−52.9 (2)C3'—C4'—C5'—C6'−1.6 (4)
C2'—Cr—C1'—C3113.1 (3)Cr—C4'—C5'—C6'−54.1 (2)
C6'—Cr—C1'—C3−116.1 (3)O4'—C4'—C5'—Cr−125.9 (3)
C3'—Cr—C1'—C3142.4 (2)C3'—C4'—C5'—Cr52.5 (2)
C5'—Cr—C1'—C3−144.8 (2)C11—Cr—C5'—C6'34.8 (4)
C4'—Cr—C1'—C3178.9 (2)C12—Cr—C5'—C6'−167.93 (16)
C6'—C1'—C2'—C3'−3.3 (4)C13—Cr—C5'—C6'−76.34 (16)
C3—C1'—C2'—C3'178.8 (2)C2'—Cr—C5'—C6'66.23 (15)
Cr—C1'—C2'—C3'−56.9 (2)C1'—Cr—C5'—C6'28.78 (14)
C6'—C1'—C2'—Cr53.6 (2)C3'—Cr—C5'—C6'102.91 (16)
C3—C1'—C2'—Cr−124.3 (2)C4'—Cr—C5'—C6'131.2 (2)
C11—Cr—C2'—C3'−123.62 (17)C11—Cr—C5'—C4'−96.4 (4)
C12—Cr—C2'—C3'−36.9 (2)C12—Cr—C5'—C4'60.89 (17)
C13—Cr—C2'—C3'154.20 (18)C13—Cr—C5'—C4'152.48 (16)
C6'—Cr—C2'—C3'101.74 (17)C2'—Cr—C5'—C4'−64.95 (15)
C1'—Cr—C2'—C3'131.5 (2)C6'—Cr—C5'—C4'−131.2 (2)
C5'—Cr—C2'—C3'65.04 (16)C1'—Cr—C5'—C4'−102.40 (16)
C4'—Cr—C2'—C3'29.07 (15)C3'—Cr—C5'—C4'−28.27 (14)
C11—Cr—C2'—C1'104.87 (16)C10—C5—C6—C7−1.7 (4)
C12—Cr—C2'—C1'−168.40 (16)C4'—C5'—C6'—C1'−0.4 (4)
C13—Cr—C2'—C1'22.7 (2)Cr—C5'—C6'—C1'−55.7 (2)
C6'—Cr—C2'—C1'−29.77 (14)C4'—C5'—C6'—Cr55.4 (2)
C3'—Cr—C2'—C1'−131.5 (2)C2'—C1'—C6'—C5'2.8 (4)
C5'—Cr—C2'—C1'−66.47 (15)C3—C1'—C6'—C5'−179.4 (2)
C4'—Cr—C2'—C1'−102.44 (16)Cr—C1'—C6'—C5'56.1 (2)
C1'—C2'—C3'—C4'1.5 (4)C2'—C1'—C6'—Cr−53.3 (2)
Cr—C2'—C3'—C4'−55.2 (2)C3—C1'—C6'—Cr124.6 (2)
C1'—C2'—C3'—Cr56.7 (2)C11—Cr—C6'—C5'−167.85 (15)
C11—Cr—C3'—C2'60.24 (18)C12—Cr—C6'—C5'19.0 (2)
C12—Cr—C3'—C2'151.31 (17)C13—Cr—C6'—C5'105.92 (16)
C13—Cr—C3'—C2'−100.7 (4)C2'—Cr—C6'—C5'−102.57 (16)
C6'—Cr—C3'—C2'−66.83 (16)C1'—Cr—C6'—C5'−132.7 (2)
C1'—Cr—C3'—C2'−29.73 (15)C3'—Cr—C6'—C5'−65.54 (15)
C5'—Cr—C3'—C2'−103.53 (17)C4'—Cr—C6'—C5'−29.31 (14)
C4'—Cr—C3'—C2'−131.7 (2)C11—Cr—C6'—C1'−35.1 (2)
C11—Cr—C3'—C4'−168.06 (16)C12—Cr—C6'—C1'151.72 (18)
C12—Cr—C3'—C4'−76.99 (17)C13—Cr—C6'—C1'−121.35 (16)
C13—Cr—C3'—C4'31.0 (5)C2'—Cr—C6'—C1'30.16 (14)
C2'—Cr—C3'—C4'131.7 (2)C3'—Cr—C6'—C1'67.20 (15)
C6'—Cr—C3'—C4'64.87 (16)C5'—Cr—C6'—C1'132.7 (2)
C1'—Cr—C3'—C4'101.97 (17)C4'—Cr—C6'—C1'103.42 (16)
C5'—Cr—C3'—C4'28.17 (15)C5—C6—C7—O7−177.2 (3)
O5—C2—C3—C4−2.0 (4)C5—C6—C7—C83.3 (4)
O5—C2—C3—C1'179.2 (2)O7—C7—C8—C9179.0 (3)
C6'—C1'—C3—C2142.3 (3)C6—C7—C8—C9−1.6 (4)
C2'—C1'—C3—C2−39.9 (4)C7—C8—C9—O5179.3 (2)
Cr—C1'—C3—C2−127.5 (2)C7—C8—C9—C10−1.8 (4)
C6'—C1'—C3—C4−36.6 (3)O5—C9—C10—C5−177.9 (2)
C2'—C1'—C3—C4141.3 (2)C8—C9—C10—C53.3 (4)
Cr—C1'—C3—C453.6 (3)O5—C9—C10—C44.3 (4)
C2—C3—C4—O4−172.4 (3)C8—C9—C10—C4−174.6 (2)
C1'—C3—C4—O46.4 (4)C6—C5—C10—C9−1.5 (4)
C2—C3—C4—C107.1 (4)C6—C5—C10—C4176.3 (3)
C1'—C3—C4—C10−174.1 (2)O4—C4—C10—C9171.3 (3)
C2'—C3'—C4'—O4'179.6 (2)C3—C4—C10—C9−8.3 (4)
Cr—C3'—C4'—O4'125.8 (2)O4—C4—C10—C5−6.5 (4)
C2'—C3'—C4'—C5'1.1 (4)C3—C4—C10—C5174.0 (2)
Cr—C3'—C4'—C5'−52.7 (2)C5'—C4'—O4'—C41'15.9 (4)
C2'—C3'—C4'—Cr53.8 (2)C3'—C4'—O4'—C41'−162.6 (2)
C11—Cr—C4'—O4'−88.0 (3)Cr—C4'—O4'—C41'−77.7 (3)
C12—Cr—C4'—O4'−3.0 (2)C3—C2—O5—C9−2.6 (4)
C13—Cr—C4'—O4'83.4 (3)C10—C9—O5—C21.4 (4)
C2'—Cr—C4'—O4'−136.3 (3)C8—C9—O5—C2−179.7 (2)
C6'—Cr—C4'—O4'149.5 (3)C8—C7—O7—C71−5.5 (4)
C1'—Cr—C4'—O4'−173.8 (2)C6—C7—O7—C71175.0 (3)
C3'—Cr—C4'—O4'−106.9 (3)
  2 in total

1.  The Cambridge Structural Database: a quarter of a million crystal structures and rising.

Authors:  Frank H Allen
Journal:  Acta Crystallogr B       Date:  2002-05-29

2.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

  2 in total
  3 in total

1.  Racemic tricarbon-yl(η-7-meth-oxy-flavan)chromium(0).

Authors:  Johannes H van Tonder; Barend C B Bezuidenhoudt; J Marthinus Janse van Rensburg
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-07-10

2.  Racemic tricarbonyl[(4a,5,6,7,8,8a-η)-2-phenyl-3,4-dihydro-2H-1-benzopyran]chromium(0).

Authors:  Johannes H van Tonder; Barend C B Bezuidenhoudt; J Marthinus Janse van Rensburg
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-08-11

3.  Racemic tricarbon-yl[7-meth-oxy-2-(η-phen-yl)chromane]-chromium(0).

Authors:  Mukut Gohain; Theunis J Muller; Barend C B Bezuidenhoudt
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-03-12
  3 in total

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