Literature DB >> 21587584

tert-Butyl N-[(11-exo-benzyl-oxy-carbonyl-8-oxopenta-cyclo-[5.4.0.0.0.0]undecane-11-endo-yloxy)carbon-yl-methyl]carbamate.

Rajshekhar Karpoormath, Thavendran Govender, Patrick Govender, Hendrik G Kruger, Glenn E M Maguire.   

Abstract

The structure of the title compound, C(26)H(29)NO(7), at 173 K has an inter-molecular N-H⋯O hydrogen bond. This is one of the few examples where a mono-ketone penta-cyclo-undecane (PCU) mol-ecule exibits hydrogen bonding in the solid state. The dihedral angles of the amide and ester groups are normal and unaffected by the cage structure. A longer than normal C-C bond [1.571 (4) Å] was found within the cage structure.

Entities:  

Year:  2010        PMID: 21587584      PMCID: PMC2983419          DOI: 10.1107/S1600536810036627

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


Related literature

For examples of cage structures with CC bonds lengths that differ from normal, see: Marchand (1989 ▶); Kruger et al. (2006 ▶). For examples of crystal structures of mono-ketone PCU mol­ecules bearing heteroatoms, see: Watson et al. (2000 ▶); Flippen-Anderson et al. (1991 ▶); Liu et al. (2001 ▶). For the synthesis of the precursors, see: Martins et al. (1993 ▶).

Experimental

Crystal data

C26H29NO7 M = 467.50 Monoclinic, a = 9.7260 (2) Å b = 27.5398 (7) Å c = 9.3500 (2) Å β = 107.679 (1)° V = 2386.14 (9) Å3 Z = 4 Cu Kα radiation μ = 0.78 mm−1 T = 173 K 0.24 × 0.22 × 0.19 mm

Data collection

Bruker Kappa DUO APEXII diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2006 ▶) T min = 0.694, T max = 0.753 8919 measured reflections 3948 independent reflections 3802 reflections with I > 2σ(I) R int = 0.024

Refinement

R[F 2 > 2σ(F 2)] = 0.038 wR(F 2) = 0.100 S = 1.07 3948 reflections 311 parameters 3 restraints H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.21 e Å−3 Δρmin = −0.18 e Å−3 Absolute structure: Flack (1983 ▶), 1760 Friedel pairs Flack parameter: 0.00 (18) Data collection: APEX2 (Bruker, 2006 ▶); cell refinement: SAINT (Bruker, 2006 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: X-SEED (Barbour, 2001 ▶); software used to prepare material for publication: SHELXL97. Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536810036627/om2360sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536810036627/om2360Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C26H29NO7F(000) = 992
Mr = 467.50Dx = 1.301 Mg m3
Monoclinic, CcCu Kα radiation, λ = 1.54178 Å
a = 9.7260 (2) ÅCell parameters from 8919 reflections
b = 27.5398 (7) Åθ = 5.9–68.1°
c = 9.3500 (2) ŵ = 0.78 mm1
β = 107.679 (1)°T = 173 K
V = 2386.14 (9) Å3Block, colourless
Z = 40.24 × 0.22 × 0.19 mm
Bruker Kappa DUO APEXII diffractometer3948 independent reflections
Radiation source: fine-focus sealed tube3802 reflections with I > 2σ(I)
graphiteRint = 0.024
0.5° φ scans and ω scansθmax = 68.1°, θmin = 5.9°
Absorption correction: multi-scan (SADABS; Bruker, 2006)h = −11→11
Tmin = 0.694, Tmax = 0.753k = −30→32
8919 measured reflectionsl = −11→10
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.038H atoms treated by a mixture of independent and constrained refinement
wR(F2) = 0.100w = 1/[σ2(Fo2) + (0.0509P)2 + 1.0452P] where P = (Fo2 + 2Fc2)/3
S = 1.07(Δ/σ)max = 0.001
3948 reflectionsΔρmax = 0.21 e Å3
311 parametersΔρmin = −0.18 e Å3
3 restraintsAbsolute structure: Flack (1983), 1760 Friedel pairs
Primary atom site location: structure-invariant direct methodsFlack parameter: 0.00 (18)
Experimental. Half sphere of data collected using SAINT strategy (Bruker, 2006). Crystal to detector distance = 50 mm; combination of φ and ω scans of 0.5°, 40 s per °, 2 iterations.
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.
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
xyzUiso*/Ueq
O10.65693 (19)1.00052 (6)0.9771 (2)0.0521 (4)
O20.76432 (15)0.90113 (5)0.91549 (15)0.0358 (3)
O30.7061 (2)0.87716 (7)0.67501 (18)0.0564 (5)
O41.1178 (2)0.90102 (8)0.6733 (2)0.0619 (5)
O51.00520 (16)0.93227 (6)0.44177 (16)0.0452 (4)
O60.5895 (2)0.78765 (6)0.8670 (3)0.0661 (5)
O70.8234 (2)0.80702 (6)0.9488 (3)0.0642 (5)
N10.9078 (2)0.94186 (8)0.6227 (2)0.0454 (4)
H1N0.836 (2)0.9596 (8)0.549 (2)0.049 (7)*
C10.4838 (3)0.88257 (10)1.2375 (3)0.0584 (6)
H1A0.55640.88071.33790.070*
H1B0.38710.87391.24420.070*
C20.4852 (3)0.93103 (9)1.1615 (3)0.0504 (6)
H20.45990.95971.21400.060*
C30.6376 (3)0.93282 (8)1.1385 (2)0.0423 (5)
H30.71400.94741.22480.051*
C40.6031 (2)0.96254 (8)0.9971 (2)0.0411 (5)
C50.4713 (3)0.93899 (8)0.8917 (3)0.0464 (5)
H50.41630.95840.80210.056*
C60.3875 (3)0.92269 (9)1.0015 (3)0.0507 (6)
H60.28460.93320.97770.061*
C70.5258 (3)0.85303 (8)1.1207 (3)0.0503 (6)
H70.53350.81731.13970.060*
C80.6645 (2)0.87760 (8)1.1087 (2)0.0385 (4)
H80.75450.86421.18090.046*
C90.6564 (2)0.86978 (7)0.9442 (2)0.0375 (4)
C100.5005 (3)0.88424 (8)0.8639 (3)0.0445 (5)
H100.46050.87270.75790.053*
C110.4164 (3)0.86818 (9)0.9720 (3)0.0503 (6)
H110.33050.84680.93050.060*
C120.7770 (2)0.90133 (7)0.7760 (2)0.0377 (4)
C130.8940 (3)0.93654 (8)0.7718 (2)0.0422 (5)
H13A0.87250.96860.80770.051*
H13B0.98700.92520.84090.051*
C141.0199 (2)0.92285 (8)0.5870 (2)0.0394 (5)
C151.1196 (2)0.91702 (8)0.3776 (2)0.0402 (5)
C161.2606 (3)0.94073 (13)0.4606 (3)0.0650 (8)
H16A1.24840.97610.45750.097*
H16B1.33400.93180.41310.097*
H16C1.29110.92970.56520.097*
C171.0661 (3)0.93591 (14)0.2193 (3)0.0681 (8)
H17A1.06060.97140.22100.102*
H17B0.97010.92250.16940.102*
H17C1.13280.92600.16440.102*
C181.1285 (4)0.86241 (11)0.3777 (4)0.0756 (9)
H18A1.03400.84890.32280.113*
H18B1.15740.85050.48140.113*
H18C1.20000.85230.32900.113*
C190.6842 (3)0.81669 (8)0.9137 (3)0.0483 (5)
C200.8571 (4)0.75648 (10)0.9237 (6)0.1008 (15)
H20A0.78390.74360.83340.121*
H20B0.85530.73641.01090.121*
C211.0032 (3)0.75425 (8)0.9029 (3)0.0489 (6)
C221.0989 (4)0.71945 (11)0.9751 (3)0.0657 (8)
H221.07660.69931.04740.079*
C231.2270 (3)0.71335 (13)0.9445 (4)0.0726 (8)
H231.29100.68820.99310.087*
C241.2633 (3)0.74254 (11)0.8465 (5)0.0752 (9)
H241.35430.73890.82980.090*
C251.1698 (4)0.77737 (10)0.7713 (3)0.0625 (7)
H251.19480.79760.70080.075*
C261.0372 (3)0.78318 (9)0.7980 (3)0.0537 (6)
H260.97070.80690.74420.064*
U11U22U33U12U13U23
O10.0568 (10)0.0371 (8)0.0610 (10)−0.0109 (7)0.0157 (8)−0.0025 (7)
O20.0419 (8)0.0373 (7)0.0348 (7)−0.0062 (6)0.0216 (6)−0.0046 (6)
O30.0766 (12)0.0561 (10)0.0430 (9)−0.0195 (9)0.0279 (8)−0.0168 (7)
O40.0599 (11)0.0840 (13)0.0476 (9)0.0323 (9)0.0251 (8)0.0226 (9)
O50.0425 (8)0.0613 (10)0.0387 (8)0.0141 (7)0.0227 (7)0.0115 (7)
O60.0722 (12)0.0430 (10)0.1014 (15)−0.0175 (9)0.0537 (12)−0.0225 (9)
O70.0624 (11)0.0325 (8)0.1147 (15)0.0020 (8)0.0524 (11)0.0000 (9)
N10.0460 (11)0.0583 (11)0.0396 (10)0.0134 (9)0.0244 (9)0.0137 (8)
C10.0604 (16)0.0588 (14)0.0715 (16)0.0052 (12)0.0429 (14)0.0033 (13)
C20.0528 (14)0.0471 (13)0.0614 (15)−0.0017 (10)0.0326 (12)−0.0095 (11)
C30.0477 (12)0.0437 (12)0.0398 (11)−0.0039 (9)0.0200 (9)−0.0083 (9)
C40.0410 (11)0.0354 (11)0.0498 (12)−0.0035 (8)0.0182 (10)−0.0077 (9)
C50.0442 (12)0.0386 (11)0.0528 (13)−0.0024 (9)0.0095 (10)−0.0039 (10)
C60.0374 (12)0.0401 (12)0.0777 (17)0.0016 (9)0.0219 (11)−0.0018 (11)
C70.0553 (14)0.0384 (11)0.0744 (16)0.0039 (10)0.0455 (13)0.0086 (10)
C80.0437 (11)0.0375 (11)0.0416 (11)0.0001 (9)0.0239 (9)0.0002 (8)
C90.0419 (11)0.0343 (10)0.0436 (11)−0.0072 (8)0.0239 (9)−0.0063 (8)
C100.0442 (12)0.0392 (12)0.0503 (12)−0.0066 (9)0.0148 (9)−0.0098 (9)
C110.0432 (12)0.0412 (12)0.0724 (15)−0.0093 (9)0.0267 (11)−0.0121 (11)
C120.0482 (12)0.0341 (10)0.0356 (10)0.0030 (9)0.0201 (9)−0.0043 (8)
C130.0501 (12)0.0475 (12)0.0369 (11)−0.0020 (9)0.0248 (10)−0.0016 (9)
C140.0435 (11)0.0412 (11)0.0381 (11)0.0039 (9)0.0193 (9)0.0060 (9)
C150.0399 (11)0.0477 (12)0.0395 (11)0.0057 (9)0.0219 (9)0.0026 (9)
C160.0528 (15)0.090 (2)0.0597 (16)−0.0151 (14)0.0291 (13)−0.0203 (14)
C170.0548 (16)0.113 (3)0.0451 (13)0.0158 (15)0.0281 (12)0.0128 (14)
C180.103 (2)0.0515 (15)0.101 (2)0.0018 (15)0.074 (2)−0.0042 (15)
C190.0599 (14)0.0373 (12)0.0645 (14)−0.0069 (10)0.0441 (12)−0.0068 (10)
C200.105 (3)0.0329 (14)0.207 (5)0.0056 (14)0.112 (3)0.0042 (19)
C210.0586 (14)0.0324 (10)0.0659 (15)0.0048 (10)0.0341 (12)0.0034 (10)
C220.090 (2)0.0604 (16)0.0514 (14)0.0184 (15)0.0279 (14)0.0185 (12)
C230.0599 (17)0.073 (2)0.077 (2)0.0147 (14)0.0076 (15)0.0090 (15)
C240.0459 (13)0.0561 (17)0.128 (3)−0.0112 (13)0.0331 (16)−0.0265 (18)
C250.089 (2)0.0453 (13)0.0697 (17)−0.0167 (13)0.0478 (16)−0.0030 (12)
C260.0608 (15)0.0406 (12)0.0575 (14)0.0066 (10)0.0144 (12)0.0122 (10)
O1—C41.210 (3)C9—C101.527 (3)
O2—C121.347 (2)C9—C191.529 (3)
O2—C91.445 (2)C10—C111.546 (3)
O3—C121.189 (3)C10—H101.0000
O4—C141.205 (3)C11—H111.0000
O5—C141.347 (3)C12—C131.505 (3)
O5—C151.476 (2)C13—H13A0.9900
O6—C191.198 (3)C13—H13B0.9900
O7—C191.320 (3)C15—C161.504 (4)
O7—C201.465 (3)C15—C171.505 (3)
N1—C141.340 (3)C15—C181.506 (4)
N1—C131.448 (3)C16—H16A0.9800
N1—H1N0.955 (10)C16—H16B0.9800
C1—C71.514 (4)C16—H16C0.9800
C1—C21.514 (4)C17—H17A0.9800
C1—H1A0.9900C17—H17B0.9800
C1—H1B0.9900C17—H17C0.9800
C2—C61.526 (4)C18—H18A0.9800
C2—C31.562 (3)C18—H18B0.9800
C2—H21.0000C18—H18C0.9800
C3—C41.504 (3)C20—C211.494 (4)
C3—C81.582 (3)C20—H20A0.9900
C3—H31.0000C20—H20B0.9900
C4—C51.506 (3)C21—C221.364 (4)
C5—C61.559 (4)C21—C261.379 (3)
C5—C101.570 (3)C22—C231.371 (5)
C5—H51.0000C22—H220.9500
C6—C111.567 (3)C23—C241.343 (5)
C6—H61.0000C23—H230.9500
C7—C111.530 (4)C24—C251.361 (5)
C7—C81.544 (3)C24—H240.9500
C7—H71.0000C25—C261.395 (4)
C8—C91.531 (3)C25—H250.9500
C8—H81.0000C26—H260.9500
C12—O2—C9117.85 (16)C7—C11—H11117.4
C14—O5—C15119.49 (17)C10—C11—H11117.4
C19—O7—C20114.5 (2)C6—C11—H11117.4
C14—N1—C13121.39 (19)O3—C12—O2124.4 (2)
C14—N1—H1N119.6 (17)O3—C12—C13126.89 (19)
C13—N1—H1N119.0 (17)O2—C12—C13108.69 (17)
C7—C1—C295.3 (2)N1—C13—C12112.50 (19)
C7—C1—H1A112.7N1—C13—H13A109.1
C2—C1—H1A112.7C12—C13—H13A109.1
C7—C1—H1B112.7N1—C13—H13B109.1
C2—C1—H1B112.7C12—C13—H13B109.1
H1A—C1—H1B110.2H13A—C13—H13B107.8
C1—C2—C6103.6 (2)O4—C14—N1124.4 (2)
C1—C2—C3103.7 (2)O4—C14—O5126.3 (2)
C6—C2—C3101.79 (18)N1—C14—O5109.31 (19)
C1—C2—H2115.3O5—C15—C16110.40 (19)
C6—C2—H2115.3O5—C15—C17102.88 (18)
C3—C2—H2115.3C16—C15—C17110.2 (2)
C4—C3—C299.81 (19)O5—C15—C18109.52 (19)
C4—C3—C8111.90 (17)C16—C15—C18113.0 (2)
C2—C3—C8102.04 (17)C17—C15—C18110.4 (2)
C4—C3—H3113.9C15—C16—H16A109.5
C2—C3—H3113.9C15—C16—H16B109.5
C8—C3—H3113.9H16A—C16—H16B109.5
O1—C4—C3128.0 (2)C15—C16—H16C109.5
O1—C4—C5126.4 (2)H16A—C16—H16C109.5
C3—C4—C5105.04 (19)H16B—C16—H16C109.5
C4—C5—C6101.77 (19)C15—C17—H17A109.5
C4—C5—C10111.17 (19)C15—C17—H17B109.5
C6—C5—C1089.40 (18)H17A—C17—H17B109.5
C4—C5—H5116.8C15—C17—H17C109.5
C6—C5—H5116.8H17A—C17—H17C109.5
C10—C5—H5116.8H17B—C17—H17C109.5
C2—C6—C5107.93 (19)C15—C18—H18A109.5
C2—C6—C11103.0 (2)C15—C18—H18B109.5
C5—C6—C1190.14 (18)H18A—C18—H18B109.5
C2—C6—H6117.3C15—C18—H18C109.5
C5—C6—H6117.3H18A—C18—H18C109.5
C11—C6—H6117.3H18B—C18—H18C109.5
C1—C7—C11104.1 (2)O6—C19—O7125.0 (2)
C1—C7—C8104.5 (2)O6—C19—C9123.1 (2)
C11—C7—C8101.31 (18)O7—C19—C9111.9 (2)
C1—C7—H7115.1O7—C20—C21109.1 (2)
C11—C7—H7115.1O7—C20—H20A109.9
C8—C7—H7115.1C21—C20—H20A109.9
C9—C8—C7103.44 (18)O7—C20—H20B109.9
C9—C8—C3110.57 (17)C21—C20—H20B109.9
C7—C8—C3102.31 (17)H20A—C20—H20B108.3
C9—C8—H8113.2C22—C21—C26118.9 (3)
C7—C8—H8113.2C22—C21—C20119.8 (3)
C3—C8—H8113.2C26—C21—C20120.8 (3)
O2—C9—C10114.94 (17)C21—C22—C23120.6 (3)
O2—C9—C19110.94 (17)C21—C22—H22119.7
C10—C9—C19111.30 (18)C23—C22—H22119.7
O2—C9—C8106.48 (16)C24—C23—C22120.8 (3)
C10—C9—C8101.39 (17)C24—C23—H23119.6
C19—C9—C8111.31 (18)C22—C23—H23119.6
C9—C10—C11104.35 (19)C23—C24—C25120.1 (3)
C9—C10—C5111.82 (18)C23—C24—H24119.9
C11—C10—C590.48 (18)C25—C24—H24119.9
C9—C10—H10115.7C24—C25—C26119.8 (3)
C11—C10—H10115.7C24—C25—H25120.1
C5—C10—H10115.7C26—C25—H25120.1
C7—C11—C10108.19 (19)C21—C26—C25119.7 (2)
C7—C11—C6102.3 (2)C21—C26—H26120.2
C10—C11—C689.98 (18)C25—C26—H26120.2
C7—C1—C2—C652.8 (2)C4—C5—C10—C9−2.9 (3)
C7—C1—C2—C3−53.2 (2)C6—C5—C10—C9−105.3 (2)
C1—C2—C3—C4149.0 (2)C4—C5—C10—C11102.8 (2)
C6—C2—C3—C441.6 (2)C6—C5—C10—C110.38 (19)
C1—C2—C3—C833.9 (2)C1—C7—C11—C10127.0 (2)
C6—C2—C3—C8−73.4 (2)C8—C7—C11—C1018.7 (2)
C2—C3—C4—O1122.5 (3)C1—C7—C11—C632.9 (2)
C8—C3—C4—O1−130.2 (2)C8—C7—C11—C6−75.4 (2)
C2—C3—C4—C5−49.2 (2)C9—C10—C11—C79.3 (2)
C8—C3—C4—C558.2 (2)C5—C10—C11—C7−103.4 (2)
O1—C4—C5—C6−136.1 (2)C9—C10—C11—C6112.32 (18)
C3—C4—C5—C635.7 (2)C5—C10—C11—C6−0.38 (18)
O1—C4—C5—C10129.9 (3)C2—C6—C11—C70.6 (2)
C3—C4—C5—C10−58.2 (2)C5—C6—C11—C7109.02 (19)
C1—C2—C6—C5−128.2 (2)C2—C6—C11—C10−108.1 (2)
C3—C2—C6—C5−20.8 (2)C5—C6—C11—C100.38 (19)
C1—C2—C6—C11−33.8 (2)C9—O2—C12—O3−0.6 (3)
C3—C2—C6—C1173.7 (2)C9—O2—C12—C13179.57 (17)
C4—C5—C6—C2−8.2 (2)C14—N1—C13—C12−107.3 (3)
C10—C5—C6—C2103.3 (2)O3—C12—C13—N14.5 (3)
C4—C5—C6—C11−111.89 (19)O2—C12—C13—N1−175.63 (18)
C10—C5—C6—C11−0.38 (18)C13—N1—C14—O4−1.3 (4)
C2—C1—C7—C11−52.6 (2)C13—N1—C14—O5178.9 (2)
C2—C1—C7—C853.3 (2)C15—O5—C14—O4−2.7 (4)
C1—C7—C8—C9−148.1 (2)C15—O5—C14—N1176.98 (19)
C11—C7—C8—C9−40.1 (2)C14—O5—C15—C16−59.9 (3)
C1—C7—C8—C3−33.1 (2)C14—O5—C15—C17−177.5 (2)
C11—C7—C8—C374.8 (2)C14—O5—C15—C1865.1 (3)
C4—C3—C8—C93.2 (2)C20—O7—C19—O61.1 (4)
C2—C3—C8—C9109.08 (19)C20—O7—C19—C9179.3 (3)
C4—C3—C8—C7−106.4 (2)O2—C9—C19—O6−147.2 (2)
C2—C3—C8—C7−0.6 (2)C10—C9—C19—O6−17.9 (3)
C12—O2—C9—C10−67.7 (2)C8—C9—C19—O694.5 (3)
C12—O2—C9—C1959.7 (2)O2—C9—C19—O734.5 (3)
C12—O2—C9—C8−179.06 (17)C10—C9—C19—O7163.9 (2)
C7—C8—C9—O2167.11 (17)C8—C9—C19—O7−83.8 (2)
C3—C8—C9—O258.2 (2)C19—O7—C20—C21155.9 (3)
C7—C8—C9—C1046.57 (19)O7—C20—C21—C22134.8 (3)
C3—C8—C9—C10−62.3 (2)O7—C20—C21—C26−52.9 (5)
C7—C8—C9—C19−71.9 (2)C26—C21—C22—C230.2 (5)
C3—C8—C9—C19179.23 (18)C20—C21—C22—C23172.6 (3)
O2—C9—C10—C11−148.11 (17)C21—C22—C23—C242.3 (5)
C19—C9—C10—C1184.7 (2)C22—C23—C24—C25−2.9 (5)
C8—C9—C10—C11−33.7 (2)C23—C24—C25—C261.1 (5)
O2—C9—C10—C5−51.7 (3)C22—C21—C26—C25−2.0 (4)
C19—C9—C10—C5−178.88 (19)C20—C21—C26—C25−174.3 (3)
C8—C9—C10—C562.7 (2)C24—C25—C26—C211.4 (4)
D—H···AD—HH···AD···AD—H···A
N1—H1N···O1i0.96 (1)1.99 (2)2.882 (2)154 (2)
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N1—H1N⋯O1i0.96 (1)1.99 (2)2.882 (2)154 (2)

Symmetry code: (i) .

  1 in total

1.  A short history of SHELX.

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

  1 in total
  2 in total

1.  Benzyl 5-hy-droxy-4-oxapenta-cyclo-[5.4.1.0.0.0]dodecane-3-carboxyl-ate.

Authors:  Rajshekhar Karpoormath; Tricia Naicker; Thavendran Govender; Hendrik G Kruger; Glenn E M Maguire
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-03-12

2.  endo-11-(Dibenzyl-amino)-tetra-cyclo-[5.4.0.0.0]undecane-8-one.

Authors:  Rajshekhar Karpoormath; Patrick Govender; Thavendran Govender; Hendrik G Kruger; Glenn E M Maguire
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-02-12
  2 in total

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