Literature DB >> 23795100

(1S,3S,8R,9S,11R)-10,10-Di-chloro-3,7,7,11-tetra-methyl-tetra-cyclo[6.5.0.0(1,3).0(9,11)]trideca-ne.

Ahmed Benharref1, Najia Ourhriss, Lahcen El Ammari, Mohamed Saadi, Moha Berraho.   

Abstract

The title compound, C17H26Cl2, was synthesized from β-himachalene (3,5,5,9-tetra-methyl-2,4a,5,6,7,8-hexa-hydro-1H-benzo-cyclo-heptene), which was isolated from the essential oil of the Atlas cedar (Cedrus Atlantica). The asymmetric unit contains two independent mol-ecules with similar conformations. Each mol-ecule is built up from fused six- and seven-membered rings and two three-membered rings from the reaction of β-himachalene with di-chloro-carbene. In both mol-ecules, the six-membered ring has a half-chair conformation, whereas the seven-membered ring displays a boat conformation. The absolute configuration was established from anomalous dispersion effects.

Entities:  

Year:  2013        PMID: 23795100      PMCID: PMC3685081          DOI: 10.1107/S1600536813013457

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


Related literature

For the reactivity and biological properties of β-himachalene, see: El Haib et al. (2011 ▶); El Jamili et al. (2002 ▶); Auhmani et al. (2002 ▶). For related structures, see: Oukhrib et al. (2013 ▶); Ourhriss et al. (2013 ▶). For puckering parameters, see: Cremer & Pople (1975 ▶).

Experimental

Crystal data

C17H26Cl2 M = 301.28 Monoclinic, a = 6.4930 (2) Å b = 29.0000 (8) Å c = 9.2854 (4) Å β = 110.454 (1)° V = 1638.18 (10) Å3 Z = 4 Mo Kα radiation μ = 0.38 mm−1 T = 296 K 0.45 × 0.35 × 0.30 mm

Data collection

Bruker APEXII CCD diffractometer 10017 measured reflections 5832 independent reflections 5438 reflections with I > 2σ(I) R int = 0.021

Refinement

R[F 2 > 2σ(F 2)] = 0.050 wR(F 2) = 0.123 S = 1.09 5832 reflections 343 parameters 1 restraint H-atom parameters constrained Δρmax = 0.29 e Å−3 Δρmin = −0.21 e Å−3 Absolute structure: Flack & Bernardinelli (2000 ▶), 1283 Friedel pairs Flack parameter: 0.05 (6) Data collection: APEX2 (Bruker, 2009 ▶); cell refinement: SAINT (Bruker, 2009 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012 ▶); software used to prepare material for publication: WinGX (Farrugia, 2012 ▶). Click here for additional data file. Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536813013457/rz5066sup1.cif Click here for additional data file. Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536813013457/rz5066Isup2.hkl Click here for additional data file. Supplementary material file. DOI: 10.1107/S1600536813013457/rz5066Isup3.cml Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C17H26Cl2F(000) = 648
Mr = 301.28Dx = 1.222 Mg m3
Monoclinic, P21Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ybCell parameters from 5832 reflections
a = 6.4930 (2) Åθ = 2.8–27.1°
b = 29.0000 (8) ŵ = 0.38 mm1
c = 9.2854 (4) ÅT = 296 K
β = 110.454 (1)°Block, colourless
V = 1638.18 (10) Å30.45 × 0.35 × 0.30 mm
Z = 4
Bruker APEXII CCD diffractometer5438 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.021
Graphite monochromatorθmax = 27.1°, θmin = 2.8°
ω and φ scansh = −8→8
10017 measured reflectionsk = −31→37
5832 independent reflectionsl = −11→11
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.050H-atom parameters constrained
wR(F2) = 0.123w = 1/[σ2(Fo2) + (0.0511P)2 + 0.9439P] where P = (Fo2 + 2Fc2)/3
S = 1.09(Δ/σ)max < 0.001
5832 reflectionsΔρmax = 0.29 e Å3
343 parametersΔρmin = −0.21 e Å3
1 restraintAbsolute structure: Flack & Bernardinelli (2000), 1283 Friedel pairs
Primary atom site location: structure-invariant direct methodsFlack parameter: 0.05 (6)
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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
C10.1016 (5)0.68419 (11)0.5418 (3)0.0366 (7)
C20.2266 (7)0.63984 (13)0.6031 (4)0.0515 (9)
H2A0.38590.64110.64100.062*
H2B0.16420.61860.65740.062*
C30.1069 (7)0.64603 (13)0.4316 (4)0.0509 (9)
C40.2490 (8)0.65463 (17)0.3354 (5)0.0680 (12)
H4A0.39030.66650.40110.082*
H4B0.27440.62560.29260.082*
C50.1471 (9)0.68839 (19)0.2059 (5)0.0743 (14)
H5A0.04790.67180.11840.089*
H5B0.26240.70160.17500.089*
C60.0183 (7)0.72809 (16)0.2487 (4)0.0630 (12)
H6A−0.03600.74850.16080.076*
H6B−0.10890.71470.26480.076*
C70.1415 (6)0.75762 (13)0.3903 (4)0.0450 (8)
C80.2305 (4)0.72854 (10)0.5441 (3)0.0328 (6)
H80.38100.71930.55680.039*
C90.2458 (5)0.75976 (11)0.6788 (4)0.0378 (7)
H90.26300.79220.65600.045*
C100.3447 (5)0.74965 (13)0.8464 (4)0.0444 (8)
C110.0997 (5)0.75392 (13)0.7759 (4)0.0453 (8)
C12−0.0366 (6)0.71010 (14)0.7494 (4)0.0513 (9)
H12A−0.16870.71600.77260.062*
H12B0.04680.68640.81940.062*
C13−0.1015 (5)0.69226 (13)0.5844 (4)0.0482 (8)
H13A−0.18250.66360.57450.058*
H13B−0.19660.71450.51430.058*
C14−0.0967 (9)0.61736 (16)0.3506 (5)0.0789 (15)
H14A−0.18050.61360.41700.118*
H14B−0.05340.58760.32560.118*
H14C−0.18490.63270.25790.118*
C150.3343 (8)0.78312 (17)0.3693 (5)0.0680 (12)
H15A0.40740.80130.45910.102*
H15B0.28110.80300.28120.102*
H15C0.43570.76120.35420.102*
C16−0.0308 (7)0.79471 (16)0.3940 (5)0.0671 (12)
H16A−0.15480.77980.40760.101*
H16B−0.07840.81150.29900.101*
H16C0.03500.81560.47770.101*
C17−0.0109 (8)0.79623 (18)0.8130 (6)0.0725 (13)
H17A−0.16680.79430.75990.109*
H17B0.04480.82350.78060.109*
H17C0.01930.79770.92170.109*
C180.6936 (5)0.51198 (11)0.7358 (3)0.0344 (6)
C190.7763 (8)0.55385 (14)0.6770 (5)0.0581 (10)
H19A0.89490.54960.63740.070*
H19B0.66980.57730.62440.070*
C200.8290 (7)0.54825 (14)0.8469 (5)0.0576 (10)
C211.0606 (7)0.53519 (19)0.9420 (5)0.0744 (14)
H21A1.14190.56290.98560.089*
H21B1.13010.52130.87550.089*
C221.0754 (8)0.5018 (2)1.0714 (5)0.0780 (15)
H22A1.07330.51921.16000.094*
H22B1.21480.48561.10050.094*
C230.8863 (8)0.46573 (17)1.0287 (4)0.0668 (12)
H23A0.91280.44531.11600.080*
H23B0.75050.48211.01530.080*
C240.8494 (6)0.43614 (13)0.8876 (4)0.0461 (8)
C250.7986 (4)0.46457 (11)0.7330 (3)0.0303 (6)
H250.93940.47010.71930.036*
C260.6606 (5)0.43506 (11)0.5985 (3)0.0342 (6)
H260.68440.40200.62020.041*
C270.5955 (6)0.44536 (12)0.4307 (4)0.0420 (7)
C280.4215 (5)0.44596 (12)0.5037 (4)0.0397 (7)
C290.3360 (5)0.49256 (14)0.5310 (4)0.0480 (8)
H29A0.17890.49040.50920.058*
H29B0.35980.51490.46050.058*
C300.4486 (5)0.50968 (12)0.6966 (4)0.0432 (8)
H30A0.39310.54000.70770.052*
H30B0.41470.48890.76720.052*
C310.7208 (9)0.58031 (16)0.9285 (6)0.0798 (15)
H31A0.77040.57281.03590.120*
H31B0.56410.57680.88510.120*
H31C0.75940.61160.91600.120*
C321.0426 (8)0.40470 (18)0.9033 (5)0.0735 (14)
H32A1.01180.38670.81130.110*
H32B1.06630.38450.98950.110*
H32C1.17190.42300.91890.110*
C330.6514 (8)0.40410 (17)0.8819 (5)0.0726 (13)
H33A0.61750.38390.79470.109*
H33B0.52530.42270.87310.109*
H33C0.69050.38610.97430.109*
C340.2538 (7)0.40760 (16)0.4689 (5)0.0673 (12)
H34A0.15520.41290.52380.101*
H34B0.32750.37870.50030.101*
H34C0.17210.40690.36050.101*
Cl10.47292 (16)0.69665 (3)0.91612 (10)0.0568 (3)
Cl20.49526 (19)0.79455 (4)0.96635 (12)0.0720 (3)
Cl30.67805 (15)0.49544 (3)0.36075 (10)0.0534 (2)
Cl40.59779 (19)0.39852 (4)0.30805 (12)0.0682 (3)
U11U22U33U12U13U23
C10.0416 (15)0.0354 (16)0.0306 (14)−0.0034 (12)0.0097 (13)0.0025 (12)
C20.070 (2)0.0372 (18)0.0417 (18)0.0024 (17)0.0129 (17)0.0019 (16)
C30.073 (2)0.0385 (19)0.0401 (17)−0.0065 (16)0.0186 (17)−0.0079 (15)
C40.078 (3)0.071 (3)0.059 (3)−0.002 (2)0.030 (2)−0.024 (2)
C50.095 (3)0.096 (4)0.043 (2)−0.028 (3)0.037 (2)−0.016 (2)
C60.071 (2)0.079 (3)0.0291 (17)−0.020 (2)0.0051 (17)0.0116 (19)
C70.0495 (18)0.046 (2)0.0351 (16)−0.0086 (14)0.0098 (14)0.0099 (15)
C80.0271 (12)0.0390 (17)0.0299 (14)−0.0022 (11)0.0068 (11)0.0042 (13)
C90.0392 (15)0.0334 (17)0.0387 (16)0.0045 (12)0.0110 (13)0.0014 (13)
C100.0448 (16)0.0470 (19)0.0360 (17)0.0013 (15)0.0071 (14)−0.0069 (15)
C110.0448 (17)0.055 (2)0.0373 (17)0.0108 (15)0.0153 (14)−0.0027 (16)
C120.0442 (18)0.069 (3)0.0476 (19)−0.0008 (16)0.0243 (16)0.0038 (18)
C130.0411 (16)0.052 (2)0.0459 (18)−0.0127 (15)0.0085 (14)0.0053 (16)
C140.113 (4)0.059 (3)0.055 (2)−0.033 (3)0.016 (3)−0.011 (2)
C150.074 (3)0.070 (3)0.066 (3)−0.020 (2)0.033 (2)0.015 (2)
C160.060 (2)0.064 (3)0.066 (3)0.011 (2)0.008 (2)0.026 (2)
C170.071 (3)0.082 (3)0.070 (3)0.030 (2)0.031 (2)−0.008 (3)
C180.0427 (15)0.0332 (15)0.0276 (13)0.0043 (12)0.0127 (12)0.0020 (12)
C190.085 (3)0.043 (2)0.047 (2)−0.0151 (19)0.023 (2)0.0003 (17)
C200.075 (3)0.047 (2)0.0443 (19)−0.0106 (18)0.0136 (19)−0.0099 (17)
C210.058 (2)0.098 (4)0.059 (3)−0.032 (2)0.011 (2)−0.033 (3)
C220.071 (3)0.106 (4)0.043 (2)0.018 (3)0.002 (2)−0.018 (3)
C230.087 (3)0.081 (3)0.0308 (17)0.030 (2)0.0176 (19)0.0110 (19)
C240.0533 (19)0.048 (2)0.0360 (17)0.0193 (16)0.0143 (15)0.0081 (15)
C250.0284 (13)0.0369 (16)0.0276 (13)0.0041 (11)0.0123 (11)0.0012 (12)
C260.0371 (15)0.0317 (16)0.0357 (16)0.0029 (12)0.0151 (13)−0.0006 (13)
C270.0438 (17)0.0473 (19)0.0337 (16)−0.0016 (13)0.0121 (14)−0.0058 (14)
C280.0363 (15)0.0465 (19)0.0356 (17)−0.0070 (13)0.0116 (14)−0.0016 (14)
C290.0315 (14)0.062 (2)0.0490 (18)0.0073 (15)0.0125 (14)−0.0024 (18)
C300.0402 (16)0.0425 (18)0.0471 (18)0.0129 (14)0.0154 (14)−0.0002 (15)
C310.113 (4)0.060 (3)0.059 (3)0.011 (3)0.020 (3)−0.026 (2)
C320.083 (3)0.077 (3)0.061 (2)0.042 (3)0.026 (2)0.024 (2)
C330.099 (3)0.066 (3)0.062 (3)−0.003 (2)0.040 (3)0.023 (2)
C340.052 (2)0.076 (3)0.062 (2)−0.029 (2)0.0056 (19)−0.003 (2)
Cl10.0599 (5)0.0659 (6)0.0385 (4)0.0183 (4)0.0095 (4)0.0086 (4)
Cl20.0732 (6)0.0774 (7)0.0529 (6)−0.0071 (6)0.0064 (5)−0.0284 (5)
Cl30.0543 (5)0.0693 (6)0.0364 (4)−0.0085 (4)0.0157 (4)0.0074 (4)
Cl40.0801 (7)0.0748 (7)0.0458 (5)0.0036 (5)0.0170 (5)−0.0248 (5)
C1—C31.515 (5)C18—C301.504 (4)
C1—C21.521 (5)C18—C191.505 (5)
C1—C131.522 (5)C18—C201.520 (5)
C1—C81.530 (4)C18—C251.539 (4)
C2—C31.518 (5)C19—C201.502 (6)
C2—H2A0.9700C19—H19A0.9700
C2—H2B0.9700C19—H19B0.9700
C3—C41.512 (6)C20—C211.502 (6)
C3—C141.520 (6)C20—C311.518 (6)
C4—C51.512 (7)C21—C221.520 (7)
C4—H4A0.9700C21—H21A0.9700
C4—H4B0.9700C21—H21B0.9700
C5—C61.554 (7)C22—C231.556 (8)
C5—H5A0.9700C22—H22A0.9700
C5—H5B0.9700C22—H22B0.9700
C6—C71.539 (5)C23—C241.513 (6)
C6—H6A0.9700C23—H23A0.9700
C6—H6B0.9700C23—H23B0.9700
C7—C151.524 (5)C24—C321.516 (5)
C7—C161.561 (6)C24—C331.572 (6)
C7—C81.583 (4)C24—C251.587 (4)
C8—C91.519 (4)C25—C261.521 (4)
C8—H80.9800C25—H250.9800
C9—C101.491 (5)C26—C271.495 (5)
C9—C111.530 (5)C26—C281.527 (4)
C9—H90.9800C26—H260.9800
C10—C111.498 (4)C27—C281.507 (5)
C10—Cl11.760 (4)C27—Cl31.750 (4)
C10—Cl21.769 (3)C27—Cl41.776 (4)
C11—C121.519 (5)C28—C341.511 (5)
C11—C171.521 (5)C28—C291.515 (5)
C12—C131.530 (5)C29—C301.536 (5)
C12—H12A0.9700C29—H29A0.9700
C12—H12B0.9700C29—H29B0.9700
C13—H13A0.9700C30—H30A0.9700
C13—H13B0.9700C30—H30B0.9700
C14—H14A0.9600C31—H31A0.9600
C14—H14B0.9600C31—H31B0.9600
C14—H14C0.9600C31—H31C0.9600
C15—H15A0.9600C32—H32A0.9600
C15—H15B0.9600C32—H32B0.9600
C15—H15C0.9600C32—H32C0.9600
C16—H16A0.9600C33—H33A0.9600
C16—H16B0.9600C33—H33B0.9600
C16—H16C0.9600C33—H33C0.9600
C17—H17A0.9600C34—H34A0.9600
C17—H17B0.9600C34—H34B0.9600
C17—H17C0.9600C34—H34C0.9600
C3—C1—C260.0 (2)C30—C18—C19115.4 (3)
C3—C1—C13120.9 (3)C30—C18—C20120.4 (3)
C2—C1—C13115.5 (3)C19—C18—C2059.5 (2)
C3—C1—C8118.8 (3)C30—C18—C25113.2 (3)
C2—C1—C8119.2 (3)C19—C18—C25119.9 (3)
C13—C1—C8112.7 (3)C20—C18—C25118.4 (3)
C3—C2—C159.8 (2)C20—C19—C1860.7 (2)
C3—C2—H2A117.8C20—C19—H19A117.7
C1—C2—H2A117.8C18—C19—H19A117.7
C3—C2—H2B117.8C20—C19—H19B117.7
C1—C2—H2B117.8C18—C19—H19B117.7
H2A—C2—H2B114.9H19A—C19—H19B114.8
C4—C3—C1116.1 (3)C21—C20—C19117.3 (4)
C4—C3—C2116.4 (4)C21—C20—C31113.9 (4)
C1—C3—C260.2 (2)C19—C20—C31118.9 (4)
C4—C3—C14113.7 (4)C21—C20—C18116.6 (3)
C1—C3—C14120.9 (4)C19—C20—C1859.8 (2)
C2—C3—C14119.5 (4)C31—C20—C18120.3 (4)
C5—C4—C3112.9 (4)C20—C21—C22113.5 (4)
C5—C4—H4A109.0C20—C21—H21A108.9
C3—C4—H4A109.0C22—C21—H21A108.9
C5—C4—H4B109.0C20—C21—H21B108.9
C3—C4—H4B109.0C22—C21—H21B108.9
H4A—C4—H4B107.8H21A—C21—H21B107.7
C4—C5—C6113.6 (3)C21—C22—C23113.6 (3)
C4—C5—H5A108.8C21—C22—H22A108.8
C6—C5—H5A108.8C23—C22—H22A108.8
C4—C5—H5B108.8C21—C22—H22B108.8
C6—C5—H5B108.8C23—C22—H22B108.8
H5A—C5—H5B107.7H22A—C22—H22B107.7
C7—C6—C5117.7 (4)C24—C23—C22118.3 (4)
C7—C6—H6A107.9C24—C23—H23A107.7
C5—C6—H6A107.9C22—C23—H23A107.7
C7—C6—H6B107.9C24—C23—H23B107.7
C5—C6—H6B107.9C22—C23—H23B107.7
H6A—C6—H6B107.2H23A—C23—H23B107.1
C15—C7—C6111.4 (3)C23—C24—C32112.5 (3)
C15—C7—C16107.2 (3)C23—C24—C33104.2 (4)
C6—C7—C16103.9 (3)C32—C24—C33106.7 (4)
C15—C7—C8108.5 (3)C23—C24—C25114.1 (3)
C6—C7—C8113.0 (3)C32—C24—C25107.6 (3)
C16—C7—C8112.7 (3)C33—C24—C25111.5 (3)
C9—C8—C1113.0 (3)C26—C25—C18112.3 (2)
C9—C8—C7108.9 (3)C26—C25—C24109.1 (3)
C1—C8—C7114.2 (2)C18—C25—C24113.7 (2)
C9—C8—H8106.8C26—C25—H25107.1
C1—C8—H8106.8C18—C25—H25107.1
C7—C8—H8106.8C24—C25—H25107.1
C10—C9—C8128.5 (3)C27—C26—C25127.9 (3)
C10—C9—C1159.5 (2)C27—C26—C2859.8 (2)
C8—C9—C11122.9 (3)C25—C26—C28123.1 (3)
C10—C9—H9112.0C27—C26—H26112.1
C8—C9—H9112.0C25—C26—H26112.1
C11—C9—H9112.0C28—C26—H26112.1
C9—C10—C1161.6 (2)C26—C27—C2861.1 (2)
C9—C10—Cl1122.1 (3)C26—C27—Cl3122.7 (2)
C11—C10—Cl1121.8 (3)C28—C27—Cl3122.2 (3)
C9—C10—Cl2117.0 (3)C26—C27—Cl4116.9 (3)
C11—C10—Cl2118.9 (3)C28—C27—Cl4118.2 (2)
Cl1—C10—Cl2108.94 (17)Cl3—C27—Cl4108.95 (19)
C10—C11—C12118.1 (3)C27—C28—C34119.5 (3)
C10—C11—C17118.8 (3)C27—C28—C29117.5 (3)
C12—C11—C17114.7 (3)C34—C28—C29114.4 (3)
C10—C11—C959.0 (2)C27—C28—C2659.1 (2)
C12—C11—C9116.3 (3)C34—C28—C26118.9 (3)
C17—C11—C9118.9 (4)C29—C28—C26116.5 (3)
C11—C12—C13112.7 (3)C28—C29—C30112.4 (3)
C11—C12—H12A109.0C28—C29—H29A109.1
C13—C12—H12A109.0C30—C29—H29A109.1
C11—C12—H12B109.0C28—C29—H29B109.1
C13—C12—H12B109.0C30—C29—H29B109.1
H12A—C12—H12B107.8H29A—C29—H29B107.9
C1—C13—C12110.6 (3)C18—C30—C29110.5 (3)
C1—C13—H13A109.5C18—C30—H30A109.6
C12—C13—H13A109.5C29—C30—H30A109.6
C1—C13—H13B109.5C18—C30—H30B109.6
C12—C13—H13B109.5C29—C30—H30B109.6
H13A—C13—H13B108.1H30A—C30—H30B108.1
C3—C14—H14A109.5C20—C31—H31A109.5
C3—C14—H14B109.5C20—C31—H31B109.5
H14A—C14—H14B109.5H31A—C31—H31B109.5
C3—C14—H14C109.5C20—C31—H31C109.5
H14A—C14—H14C109.5H31A—C31—H31C109.5
H14B—C14—H14C109.5H31B—C31—H31C109.5
C7—C15—H15A109.5C24—C32—H32A109.5
C7—C15—H15B109.5C24—C32—H32B109.5
H15A—C15—H15B109.5H32A—C32—H32B109.5
C7—C15—H15C109.5C24—C32—H32C109.5
H15A—C15—H15C109.5H32A—C32—H32C109.5
H15B—C15—H15C109.5H32B—C32—H32C109.5
C7—C16—H16A109.5C24—C33—H33A109.5
C7—C16—H16B109.5C24—C33—H33B109.5
H16A—C16—H16B109.5H33A—C33—H33B109.5
C7—C16—H16C109.5C24—C33—H33C109.5
H16A—C16—H16C109.5H33A—C33—H33C109.5
H16B—C16—H16C109.5H33B—C33—H33C109.5
C11—C17—H17A109.5C28—C34—H34A109.5
C11—C17—H17B109.5C28—C34—H34B109.5
H17A—C17—H17B109.5H34A—C34—H34B109.5
C11—C17—H17C109.5C28—C34—H34C109.5
H17A—C17—H17C109.5H34A—C34—H34C109.5
H17B—C17—H17C109.5H34B—C34—H34C109.5
  3 in total

1.  A short history of SHELX.

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

2.  (1S,3R,8R,9R,10S)-2,2-Dibromo-3,7,7,10-tetra-methyl-9β,10β-ep-oxy-3,7,7,10-tetra-methyl-tricyclo-[6.4.0.0(1,3)]dodeca-ne.

Authors:  Abdelouahd Oukhrib; Ahmed Benharref; Mohamed Saadi; Moha Berraho; Lahcen El Ammari
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-03-09

3.  (1S,3R,8R,9S,11R)-2,2,10,10-Tetra-chloro-3,7,7,11-tetra-methyl-tetra-cyclo-[6.5.0.0(1,3).0(9,11)]trideca-ne.

Authors:  Najia Ourhriss; Ahmed Benharref; Mohamed Saadi; Lahcen El Ammari; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-01-23
  3 in total
  8 in total

1.  Crystal structure of (1S,3R,8R,9S,10R)-10-bromo-methyl-2,2-di-chloro-9,10-ep-oxy-3,7,7-tri-methyl-tri-cyclo-[6.4.0.0(1,3)]dodeca-ne.

Authors:  Ahmed Benharref; Lahcen El Ammari; Mohamed Saadi; Moha Berraho
Journal:  Acta Crystallogr E Crystallogr Commun       Date:  2015-04-09

2.  (1R,4R,6S,7S)-5,5-Di-chloro-1,4,8,8-tetra-methyl-tri-cyclo-[5.4.1(1,7).0(4,6)]dodecan-12-one.

Authors:  Ahmed Benharref; Jamal El Karroumi; Jean-Claude Daran; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-10-26

3.  (1S,3R,8R,10R)-2,2-Di-bromo-3,7,7,10-tetra-methyl-tri-cyclo-[6.4.0.0(1,3)]dodecan-9-one.

Authors:  Ahmed Benharref; Noureddine Mazoir; Jean-Claude Daran; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-11-16

4.  (1R,4R,6S,7R)-5,5-Di-bromo-1,4,8,8-tetra-methyl-tri-cyclo-[5.4.1.0(4,6)]dodecan-12-one.

Authors:  Mohamed Zaki; Ahmed Benharref; Jean-Claude Daran; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2014-04-09

5.  (1S,2R,3S,6S,7R)-3,7,11,11-Tetra-methyl-6,7-epoxybi-cyclo-[5.4.0]undecane-2-ol.

Authors:  Mohamed Loubidi; Ahmed Benharref; Lahcen El Ammari; Mohamed Saadi; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2014-04-26

6.  (1S,3S,8R,10R,11R)-3,7,7,10-Tetra-methyl-tri-cyclo-[6.4.0.0(1,3)]dodecan-11-ol.

Authors:  Ahmed Benharref; Jamal El Karroumi; Lahcen El Ammari; Mohamed Saadi; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-07-31

7.  1-[(1S,6R,7S,9R)-8,8-Di-bromo-5,5,9-tri-methyl-tri-cyclo-[4.4.0.1(7,9)]decan-1-yl]ethanone.

Authors:  Mohamed Zaki; Ahmed Benharref; Lahcen El Ammari; Mohamed Saadi; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2014-03-15

8.  (1S,2R,7R,8S,10R)-9,9-Di-bromo-2,6,6,10-tetra-methyl-1α,2α-ep-oxy-tri-cyclo-[5.5.0.0(8,10)]dodeca-ne.

Authors:  Ahmed Benharref; Jamal El Karroumi; Lahcen El Ammari; Mohamed Saadi; Moha Berraho
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2013-06-08
  8 in total

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