#------------------------------------------------------------------------------ #$Date: 2014-10-23 17:15:15 +0300 (Thu, 23 Oct 2014) $ #$Revision: 125790 $ #$URL: file:///home/coder/svn-repositories/cod/cif/1/51/81/1518109.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/ # # All data on this site have been placed in the public domain by the # contributors. # data_1518109 loop_ _publ_author_name 'Raja, Arun' 'Hong, Bor-Cherng' 'Lee, Gene-Hsiang' _publ_section_title ; Organocatalytic Enantioselective Michael-Michael-Michael-Aldol Condensation Reactions: Control of Five Stereocenters in a Quadruple-Cascade Asymmetric Synthesis of Highly Functionalized Hexahydrophenanthrenes. ; _journal_name_full 'Organic letters' _journal_page_first 141022161905006 _journal_paper_doi 10.1021/ol502821e _journal_year 2014 _chemical_absolute_configuration ad _chemical_formula_sum 'C34 H25 Cl2 N3 O8' _chemical_formula_weight 674.47 _chemical_name_systematic ; ? ; _space_group_IT_number 19 _symmetry_cell_setting orthorhombic _symmetry_space_group_name_Hall 'P 2ac 2ab' _symmetry_space_group_name_H-M 'P 21 21 21' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_method SHELXL-97 _cell_angle_alpha 90.00 _cell_angle_beta 90.00 _cell_angle_gamma 90.00 _cell_formula_units_Z 4 _cell_length_a 9.1287(2) _cell_length_b 14.7136(3) _cell_length_c 22.5741(4) _cell_measurement_reflns_used 18597 _cell_measurement_temperature 200(2) _cell_measurement_theta_max 27.50 _cell_measurement_theta_min 1.65 _cell_volume 3032.06(11) _computing_cell_refinement DENZO-SMN _computing_data_collection 'NONIUS COLLECT' _computing_data_reduction DENZO-SMN _computing_molecular_graphics 'Bruker SHELXTL' _computing_publication_material 'Bruker SHELXTL' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 2008)' _computing_structure_solution 'SHELXS-97 (Sheldrick, 2008)' _diffrn_ambient_temperature 200(2) _diffrn_measured_fraction_theta_full 0.998 _diffrn_measured_fraction_theta_max 0.998 _diffrn_measurement_device_type 'NONIUS KappaCCD' _diffrn_measurement_method '\w scans' _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.0401 _diffrn_reflns_av_sigmaI/netI 0.0522 _diffrn_reflns_limit_h_max 11 _diffrn_reflns_limit_h_min -11 _diffrn_reflns_limit_k_max 19 _diffrn_reflns_limit_k_min -19 _diffrn_reflns_limit_l_max 28 _diffrn_reflns_limit_l_min -28 _diffrn_reflns_number 18597 _diffrn_reflns_theta_full 27.50 _diffrn_reflns_theta_max 27.50 _diffrn_reflns_theta_min 1.65 _exptl_absorpt_coefficient_mu 0.275 _exptl_absorpt_correction_T_max 0.9421 _exptl_absorpt_correction_T_min 0.8864 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details 'SORTAV (Blessing, 1995)' _exptl_crystal_colour colorless _exptl_crystal_density_diffrn 1.478 _exptl_crystal_density_method 'not measured' _exptl_crystal_description block _exptl_crystal_F_000 1392 _exptl_crystal_size_max 0.45 _exptl_crystal_size_mid 0.25 _exptl_crystal_size_min 0.22 _refine_diff_density_max 0.191 _refine_diff_density_min -0.205 _refine_diff_density_rms 0.040 _refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881' _refine_ls_abs_structure_Flack -0.03(4) _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.007 _refine_ls_hydrogen_treatment constr _refine_ls_matrix_type full _refine_ls_number_parameters 424 _refine_ls_number_reflns 6940 _refine_ls_number_restraints 1 _refine_ls_restrained_S_all 1.008 _refine_ls_R_factor_all 0.0639 _refine_ls_R_factor_gt 0.0374 _refine_ls_shift/su_max 0.002 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0421P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.0782 _refine_ls_wR_factor_ref 0.0853 _reflns_number_gt 5016 _reflns_number_total 6940 _reflns_threshold_expression >2sigma(I) _[local]_cod_data_source_file ol502821e_si_002.cif _[local]_cod_data_source_block ic16882 _[local]_cod_cif_authors_sg_H-M P2(1)2(1)2(1) _cod_depositor_comments ; The following automatic conversions were performed: '_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic' according to /home/saulius/struct/COD-crude-data--automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26. Automatic conversion script Id: cif_fix_values 2827 2014-09-09 07:05:25Z andrius ; _cod_database_code 1518109 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, -y, z+1/2' '-x, y+1/2, -z+1/2' 'x+1/2, -y+1/2, -z' loop_ _atom_site_label _atom_site_type_symbol _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_adp_type _atom_site_occupancy _atom_site_symmetry_multiplicity _atom_site_calc_flag _atom_site_refinement_flags Cl1 Cl -0.02932(8) 0.27441(3) 0.96758(2) 0.06122(18) Uani 1 1 d . Cl2 Cl 0.60452(9) 0.95110(5) 0.50339(3) 0.0762(2) Uani 1 1 d . O1 O 0.1816(2) 0.80877(11) 0.98766(7) 0.0714(5) Uani 1 1 d . O2 O 0.26287(18) 0.68256(11) 0.95566(7) 0.0620(5) Uani 1 1 d . O3 O -0.18456(18) 0.51553(10) 1.05515(6) 0.0552(4) Uani 1 1 d . O4 O -0.24435(18) 0.38045(10) 1.02807(7) 0.0629(4) Uani 1 1 d . O5 O 0.2544(3) 0.30268(12) 0.86900(10) 0.0889(6) Uani 1 1 d . O6 O 0.0448(2) 0.28300(11) 0.82704(7) 0.0772(6) Uani 1 1 d . O7 O 0.21739(16) 0.92050(8) 0.74962(5) 0.0408(3) Uani 1 1 d . O8 O 0.18936(16) 1.06992(9) 0.73587(6) 0.0460(4) Uani 1 1 d . N1 N 0.17320(19) 0.74344(10) 0.95535(6) 0.0374(4) Uani 1 1 d U N2 N -0.17550(19) 0.45069(12) 1.02182(7) 0.0418(4) Uani 1 1 d . N3 N 0.1279(3) 0.32229(12) 0.86040(9) 0.0552(5) Uani 1 1 d . C1 C 0.1898(2) 0.75989(12) 0.80679(8) 0.0324(4) Uani 1 1 d . H1 H 0.2511 0.7694 0.7734 0.039 Uiso 1 1 calc R C2 C 0.1211(2) 0.83161(12) 0.82881(8) 0.0299(4) Uani 1 1 d . C3 C 0.0177(2) 0.82589(11) 0.88135(8) 0.0304(4) Uani 1 1 d . H3 H 0.0410 0.8773 0.9088 0.036 Uiso 1 1 calc R C4 C 0.0393(2) 0.73652(11) 0.91545(7) 0.0302(4) Uani 1 1 d U H4 H -0.0484 0.7272 0.9413 0.036 Uiso 1 1 calc R C5 C 0.0489(2) 0.65637(11) 0.87300(7) 0.0299(4) Uani 1 1 d . H5 H -0.0391 0.6633 0.8470 0.036 Uiso 1 1 calc R C6 C 0.0332(2) 0.56174(12) 0.89895(8) 0.0304(4) Uani 1 1 d . C7 C -0.0518(2) 0.54609(12) 0.94907(8) 0.0340(4) Uani 1 1 d . H7 H -0.0939 0.5964 0.9693 0.041 Uiso 1 1 calc R C8 C -0.0767(2) 0.45909(13) 0.97025(8) 0.0361(5) Uani 1 1 d . C9 C -0.0151(2) 0.38405(12) 0.94266(8) 0.0400(5) Uani 1 1 d . C10 C 0.0670(2) 0.40155(13) 0.89224(8) 0.0386(5) Uani 1 1 d . C11 C 0.0933(2) 0.48750(12) 0.86890(8) 0.0338(4) Uani 1 1 d . C12 C 0.1841(2) 0.49822(12) 0.81270(8) 0.0390(5) Uani 1 1 d . H12A H 0.1568 0.4496 0.7845 0.047 Uiso 1 1 calc R H12B H 0.2889 0.4904 0.8227 0.047 Uiso 1 1 calc R C13 C 0.1630(2) 0.59089(12) 0.78254(7) 0.0327(4) Uani 1 1 d . H13 H 0.0603 0.5934 0.7672 0.039 Uiso 1 1 calc R C14 C 0.1784(2) 0.66493(11) 0.83038(7) 0.0303(4) Uani 1 1 d . H14 H 0.2698 0.6520 0.8533 0.036 Uiso 1 1 calc R C15 C 0.1371(2) 0.92619(12) 0.80455(8) 0.0353(5) Uani 1 1 d . H15A H 0.0394 0.9533 0.7976 0.042 Uiso 1 1 calc R H15B H 0.1906 0.9649 0.8332 0.042 Uiso 1 1 calc R C16 C 0.2351(2) 0.99772(13) 0.71949(9) 0.0336(4) Uani 1 1 d . C17 C 0.3217(2) 0.98340(12) 0.66434(8) 0.0345(4) Uani 1 1 d . C18 C 0.3659(2) 1.05969(13) 0.63245(8) 0.0374(5) Uani 1 1 d . H18 H 0.3362 1.1186 0.6449 0.045 Uiso 1 1 calc R C19 C 0.4526(2) 1.04976(14) 0.58288(8) 0.0423(5) Uani 1 1 d . H19 H 0.4847 1.1016 0.5614 0.051 Uiso 1 1 calc R C20 C 0.4918(3) 0.96413(14) 0.56495(8) 0.0480(5) Uani 1 1 d . C21 C 0.4453(3) 0.88738(15) 0.59506(9) 0.0559(6) Uani 1 1 d . H21 H 0.4710 0.8285 0.5812 0.067 Uiso 1 1 calc R C22 C 0.3614(2) 0.89750(14) 0.64519(8) 0.0459(5) Uani 1 1 d . H22 H 0.3307 0.8454 0.6667 0.055 Uiso 1 1 calc R C23 C -0.1427(2) 0.83500(12) 0.86259(8) 0.0316(4) Uani 1 1 d . C24 C -0.2427(3) 0.87199(15) 0.90182(10) 0.0493(5) Uani 1 1 d . H24 H -0.2103 0.8919 0.9396 0.059 Uiso 1 1 calc R C25 C -0.3883(3) 0.88038(19) 0.88701(13) 0.0684(7) Uani 1 1 d . H25 H -0.4553 0.9060 0.9145 0.082 Uiso 1 1 calc R C26 C -0.4369(3) 0.85186(18) 0.83265(13) 0.0679(7) Uani 1 1 d . H26 H -0.5374 0.8580 0.8226 0.082 Uiso 1 1 calc R C27 C -0.3403(3) 0.81432(16) 0.79248(10) 0.0538(6) Uani 1 1 d . H27 H -0.3735 0.7946 0.7547 0.065 Uiso 1 1 calc R C28 C -0.1935(2) 0.80588(13) 0.80812(9) 0.0398(5) Uani 1 1 d . H28 H -0.1267 0.7796 0.7808 0.048 Uiso 1 1 calc R C29 C 0.2659(2) 0.60379(12) 0.73008(8) 0.0336(4) Uani 1 1 d . C30 C 0.4157(2) 0.60652(15) 0.73639(9) 0.0456(5) Uani 1 1 d . H30 H 0.4572 0.5954 0.7743 0.055 Uiso 1 1 calc R C31 C 0.5078(3) 0.62491(15) 0.68928(9) 0.0514(6) Uani 1 1 d . H31 H 0.6109 0.6263 0.6948 0.062 Uiso 1 1 calc R C32 C 0.4486(3) 0.64109(14) 0.63447(9) 0.0510(6) Uani 1 1 d . H32 H 0.5109 0.6547 0.6020 0.061 Uiso 1 1 calc R C33 C 0.2997(3) 0.63771(15) 0.62638(9) 0.0538(6) Uani 1 1 d . H33 H 0.2593 0.6477 0.5882 0.065 Uiso 1 1 calc R C34 C 0.2082(3) 0.61966(14) 0.67402(8) 0.0436(5) Uani 1 1 d . H34 H 0.1052 0.6181 0.6683 0.052 Uiso 1 1 calc R loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_23 _atom_site_aniso_U_13 _atom_site_aniso_U_12 Cl1 0.0999(5) 0.0316(2) 0.0521(3) 0.0113(2) 0.0050(3) -0.0059(3) Cl2 0.1058(6) 0.0657(4) 0.0571(3) -0.0069(3) 0.0399(4) -0.0192(4) O1 0.0879(13) 0.0506(9) 0.0757(11) -0.0221(9) -0.0383(10) 0.0123(9) O2 0.0615(11) 0.0746(11) 0.0500(9) -0.0115(8) -0.0176(8) 0.0299(9) O3 0.0664(11) 0.0544(9) 0.0448(8) -0.0025(8) 0.0136(8) -0.0112(8) O4 0.0678(11) 0.0550(9) 0.0658(9) 0.0140(9) 0.0099(9) -0.0262(9) O5 0.0820(15) 0.0579(11) 0.1269(17) -0.0058(11) 0.0164(14) 0.0282(11) O6 0.1241(17) 0.0495(9) 0.0579(10) -0.0154(9) 0.0118(11) -0.0150(11) O7 0.0555(9) 0.0295(6) 0.0376(7) 0.0055(6) 0.0123(7) -0.0006(6) O8 0.0483(9) 0.0348(7) 0.0549(8) 0.0095(7) 0.0094(7) 0.0056(7) N1 0.0462(10) 0.0351(9) 0.0310(8) 0.0006(8) -0.0048(7) 0.0015(8) N2 0.0447(11) 0.0449(10) 0.0357(9) 0.0093(9) -0.0047(8) -0.0055(9) N3 0.0829(17) 0.0294(9) 0.0532(12) 0.0036(9) 0.0133(12) -0.0017(11) C1 0.0318(11) 0.0328(9) 0.0325(9) 0.0009(8) 0.0032(9) -0.0037(9) C2 0.0297(11) 0.0292(9) 0.0309(9) 0.0023(8) 0.0009(8) -0.0013(8) C3 0.0357(11) 0.0256(8) 0.0299(9) 0.0006(8) 0.0016(8) -0.0003(8) C4 0.0310(10) 0.0297(9) 0.0298(9) 0.0022(8) 0.0025(7) 0.0016(8) C5 0.0314(11) 0.0282(9) 0.0303(9) 0.0013(8) -0.0003(9) 0.0006(8) C6 0.0319(11) 0.0279(9) 0.0314(9) 0.0016(8) -0.0026(8) -0.0017(8) C7 0.0368(11) 0.0326(9) 0.0325(9) 0.0007(9) -0.0026(9) -0.0014(9) C8 0.0407(12) 0.0367(10) 0.0310(10) 0.0053(9) -0.0032(9) -0.0064(9) C9 0.0511(13) 0.0331(9) 0.0358(10) 0.0083(9) -0.0065(10) -0.0069(10) C10 0.0490(13) 0.0287(9) 0.0381(10) -0.0020(9) -0.0038(10) 0.0034(9) C11 0.0373(12) 0.0311(9) 0.0331(10) 0.0011(8) -0.0039(9) -0.0007(8) C12 0.0483(13) 0.0293(9) 0.0393(11) -0.0049(9) 0.0039(10) 0.0011(9) C13 0.0352(11) 0.0297(9) 0.0333(9) -0.0011(8) -0.0015(8) 0.0003(9) C14 0.0312(11) 0.0284(9) 0.0314(9) 0.0010(8) 0.0001(8) -0.0001(8) C15 0.0401(12) 0.0314(9) 0.0345(10) 0.0018(9) 0.0065(9) 0.0017(9) C16 0.0315(11) 0.0293(9) 0.0399(11) 0.0074(9) -0.0032(9) -0.0037(8) C17 0.0349(11) 0.0341(10) 0.0344(10) 0.0052(9) -0.0074(10) -0.0055(9) C18 0.0390(12) 0.0351(10) 0.0380(11) 0.0067(9) -0.0041(9) -0.0025(9) C19 0.0468(13) 0.0411(11) 0.0390(11) 0.0097(10) -0.0019(10) -0.0110(10) C20 0.0581(15) 0.0514(12) 0.0345(11) 0.0017(10) 0.0073(11) -0.0131(12) C21 0.0797(18) 0.0392(11) 0.0488(12) -0.0053(11) 0.0160(13) -0.0098(12) C22 0.0624(15) 0.0349(10) 0.0405(11) 0.0042(10) 0.0090(11) -0.0077(11) C23 0.0344(12) 0.0258(8) 0.0345(10) 0.0047(8) 0.0014(9) 0.0007(8) C24 0.0452(14) 0.0522(12) 0.0505(12) -0.0079(11) 0.0075(11) 0.0042(11) C25 0.0384(15) 0.0829(19) 0.0838(18) -0.0092(16) 0.0141(14) 0.0120(14) C26 0.0319(14) 0.0690(16) 0.103(2) 0.0069(16) -0.0094(15) 0.0034(12) C27 0.0496(15) 0.0521(13) 0.0597(14) 0.0063(11) -0.0157(13) -0.0034(12) C28 0.0388(13) 0.0388(10) 0.0417(11) 0.0024(9) -0.0003(10) 0.0016(9) C29 0.0396(12) 0.0264(9) 0.0348(10) -0.0037(8) 0.0020(9) 0.0026(9) C30 0.0412(14) 0.0577(13) 0.0379(11) 0.0067(11) 0.0002(10) 0.0091(11) C31 0.0442(14) 0.0543(12) 0.0557(13) 0.0030(12) 0.0099(11) 0.0085(11) C32 0.0671(18) 0.0423(12) 0.0435(12) -0.0031(10) 0.0216(12) -0.0006(12) C33 0.0744(19) 0.0558(14) 0.0312(11) -0.0027(10) -0.0003(12) 0.0000(13) C34 0.0489(14) 0.0478(11) 0.0341(10) -0.0029(10) -0.0042(10) -0.0048(10) loop_ _atom_type_symbol _atom_type_description _atom_type_scat_dispersion_real _atom_type_scat_dispersion_imag _atom_type_scat_source C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle C16 O7 C15 116.77(14) O1 N1 O2 122.74(17) O1 N1 C4 117.46(16) O2 N1 C4 119.72(15) O4 N2 O3 123.93(17) O4 N2 C8 118.51(17) O3 N2 C8 117.55(16) O5 N3 O6 125.7(2) O5 N3 C10 118.1(2) O6 N3 C10 116.2(2) C2 C1 C14 125.22(17) C1 C2 C15 123.71(16) C1 C2 C3 122.92(16) C15 C2 C3 113.37(15) C2 C3 C23 111.97(14) C2 C3 C4 111.03(14) C23 C3 C4 109.68(15) C5 C4 N1 112.23(15) C5 C4 C3 110.80(13) N1 C4 C3 110.04(14) C6 C5 C4 117.55(14) C6 C5 C14 113.05(15) C4 C5 C14 112.13(14) C7 C6 C11 118.97(16) C7 C6 C5 121.23(16) C11 C6 C5 119.51(15) C8 C7 C6 121.68(17) C7 C8 C9 120.94(17) C7 C8 N2 116.70(17) C9 C8 N2 122.32(16) C8 C9 C10 116.09(16) C8 C9 Cl1 124.85(15) C10 C9 Cl1 119.02(16) C9 C10 C11 124.97(18) C9 C10 N3 117.12(16) C11 C10 N3 117.89(17) C10 C11 C6 117.30(17) C10 C11 C12 120.25(17) C6 C11 C12 122.45(16) C11 C12 C13 113.14(15) C29 C13 C12 112.20(15) C29 C13 C14 113.60(15) C12 C13 C14 107.79(14) C1 C14 C5 110.71(15) C1 C14 C13 114.61(14) C5 C14 C13 108.18(15) O7 C15 C2 107.99(14) O8 C16 O7 123.69(18) O8 C16 C17 124.57(17) O7 C16 C17 111.72(16) C22 C17 C18 119.90(18) C22 C17 C16 121.96(17) C18 C17 C16 118.13(17) C19 C18 C17 120.02(18) C20 C19 C18 119.14(19) C19 C20 C21 121.64(19) C19 C20 Cl2 119.45(16) C21 C20 Cl2 118.91(17) C22 C21 C20 119.1(2) C21 C22 C17 120.14(18) C28 C23 C24 118.08(19) C28 C23 C3 122.66(17) C24 C23 C3 119.24(17) C25 C24 C23 121.1(2) C26 C25 C24 120.2(2) C25 C26 C27 120.3(2) C26 C27 C28 119.0(2) C23 C28 C27 121.4(2) C30 C29 C34 117.76(19) C30 C29 C13 122.43(17) C34 C29 C13 119.66(18) C29 C30 C31 122.0(2) C32 C31 C30 119.2(2) C31 C32 C33 120.3(2) C32 C33 C34 120.0(2) C33 C34 C29 120.7(2) loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance Cl1 C9 1.7134(18) Cl2 C20 1.740(2) O1 N1 1.209(2) O2 N1 1.213(2) O3 N2 1.218(2) O4 N2 1.218(2) O5 N3 1.206(3) O6 N3 1.215(3) O7 C16 1.334(2) O7 C15 1.443(2) O8 C16 1.200(2) N1 C4 1.522(2) N2 C8 1.478(3) N3 C10 1.479(3) C1 C2 1.324(2) C1 C14 1.499(2) C2 C15 1.503(2) C2 C3 1.518(3) C3 C23 1.530(3) C3 C4 1.536(2) C4 C5 1.522(2) C5 C6 1.517(2) C5 C14 1.530(2) C6 C7 1.391(3) C6 C11 1.398(3) C7 C8 1.385(2) C8 C9 1.387(3) C9 C10 1.387(3) C10 C11 1.391(3) C11 C12 1.523(3) C12 C13 1.536(2) C13 C29 1.523(3) C13 C14 1.540(2) C16 C17 1.490(3) C17 C22 1.384(3) C17 C18 1.393(3) C18 C19 1.378(3) C19 C20 1.371(3) C20 C21 1.385(3) C21 C22 1.374(3) C23 C28 1.382(3) C23 C24 1.383(3) C24 C25 1.376(3) C25 C26 1.371(4) C26 C27 1.380(3) C27 C28 1.392(3) C29 C30 1.376(3) C29 C34 1.390(3) C30 C31 1.382(3) C31 C32 1.371(3) C32 C33 1.372(3) C33 C34 1.387(3)