#------------------------------------------------------------------------------ #$Date: 2012-02-24 18:13:23 +0100 (Fri, 24 Feb 2012) $ #$Revision: 34330 $ #$URL: svn://www.crystallography.net/cod/cif/4/30/11/4301143.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_4301143 loop_ _publ_author_name 'Anthony Haynes' 'Anthony J. H. M. Meijer' 'James R. Lyons' 'Harry Adams' _publ_section_title ; Identification of the Reactive cis,mer Isomer of [Ir(CO)2I3Me]-: Relation to the Mechanism of Iridium-Catalyzed Methanol Carbonylation ; _journal_name_full 'Inorganic Chemistry' _journal_page_first 28 _journal_page_last 35 _journal_volume 48 _journal_year 2009 _chemical_formula_sum 'C28 H23 As I3 Ir O3' _chemical_formula_weight 1055.28 _chemical_name_systematic ; ? ; _space_group_IT_number 14 _symmetry_cell_setting monoclinic _symmetry_space_group_name_Hall '-P 2ybc' _symmetry_space_group_name_H-M 'P 1 21/c 1' _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 95.222(2) _cell_angle_gamma 90.00 _cell_formula_units_Z 4 _cell_length_a 13.1653(11) _cell_length_b 8.7612(7) _cell_length_c 27.114(2) _cell_measurement_reflns_used 8428 _cell_measurement_temperature 150(2) _cell_measurement_theta_max 54.917 _cell_measurement_theta_min 4.523 _cell_volume 3114.5(4) _computing_cell_refinement 'Bruker SMART' _computing_data_collection 'Bruker SMART' _computing_data_reduction 'Bruker SHELXTL' _computing_molecular_graphics 'Bruker SHELXTL' _computing_publication_material 'Bruker SHELXTL' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS-97 (Sheldrick, 1990)' _diffrn_ambient_temperature 150(2) _diffrn_detector_area_resol_mean 100 _diffrn_measured_fraction_theta_full 0.982 _diffrn_measured_fraction_theta_max 0.982 _diffrn_measurement_device_type 'Bruker SMART1000' _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 0.0550 _diffrn_reflns_av_sigmaI/netI 0.0493 _diffrn_reflns_limit_h_max 16 _diffrn_reflns_limit_h_min -17 _diffrn_reflns_limit_k_max 11 _diffrn_reflns_limit_k_min -11 _diffrn_reflns_limit_l_max 35 _diffrn_reflns_limit_l_min -34 _diffrn_reflns_number 31655 _diffrn_reflns_theta_full 27.58 _diffrn_reflns_theta_max 27.58 _diffrn_reflns_theta_min 1.51 _diffrn_standards_decay_% 0 _diffrn_standards_number 0 _exptl_absorpt_coefficient_mu 8.341 _exptl_absorpt_correction_T_max 0.368 _exptl_absorpt_correction_T_min 0.053 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details SADABS _exptl_crystal_colour orange _exptl_crystal_density_diffrn 2.251 _exptl_crystal_density_method 'not measured' _exptl_crystal_description plate _exptl_crystal_F_000 1936 _exptl_crystal_size_max 0.41 _exptl_crystal_size_mid 0.12 _exptl_crystal_size_min 0.12 _refine_diff_density_max 2.446 _refine_diff_density_min -1.808 _refine_diff_density_rms 0.192 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.021 _refine_ls_hydrogen_treatment constr _refine_ls_matrix_type full _refine_ls_number_parameters 325 _refine_ls_number_reflns 7093 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.021 _refine_ls_R_factor_all 0.0668 _refine_ls_R_factor_gt 0.0425 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0545P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.0938 _refine_ls_wR_factor_ref 0.1028 _reflns_number_gt 5282 _reflns_number_total 7093 _reflns_threshold_expression >2sigma(I) _[local]_cod_data_source_file ic8017858_si_002_1.cif _[local]_cod_data_source_block iah153m _[local]_cod_cif_authors_sg_H-M 'P 21/c' _cod_depositor_comments ; The following automatic conversions were performed: '_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29. '_exptl_absorpt_correction_type' value 'MULTI-SCAN' changed to 'multi-scan' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29. Automatic conversion script Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius ; _cod_original_cell_volume 3114.4(4) _cod_database_code 4301143 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, y+1/2, -z+1/2' '-x, -y, -z' 'x, -y-1/2, z-1/2' 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 _atom_site_disorder_assembly _atom_site_disorder_group Ir1 Ir 0.78590(2) 0.19065(3) 0.132909(10) 0.02932(9) Uani 1 1 d . . . I1 I 0.94791(3) 0.20053(5) 0.079240(18) 0.03616(13) Uani 1 1 d . . . I2 I 0.65245(4) 0.24065(5) 0.046826(19) 0.03871(13) Uani 1 1 d . . . I3 I 0.62952(4) 0.17075(5) 0.18950(2) 0.05279(17) Uani 1 1 d . . . As1 As 0.28439(5) 0.97107(7) 0.11378(3) 0.02812(16) Uani 1 1 d . . . O1 O 0.7820(4) 0.5333(5) 0.1492(2) 0.0499(14) Uani 1 1 d . . . O2 O 0.7738(4) -0.1546(5) 0.1162(2) 0.0468(13) Uani 1 1 d . . . O3 O 0.9043(4) 0.0202(6) 0.2081(2) 0.0562(15) Uani 1 1 d . . . C1 C 0.7855(5) 0.4079(8) 0.1435(3) 0.0377(17) Uani 1 1 d . . . C2 C 0.7786(5) -0.0272(7) 0.1220(3) 0.0310(15) Uani 1 1 d . . . C3 C 0.8884(6) 0.1470(8) 0.1957(3) 0.0444(19) Uani 1 1 d . . . C4 C 0.9428(9) 0.2825(11) 0.2187(4) 0.085(3) Uani 1 1 d . . . H4A H 0.9883 0.2497 0.2473 0.127 Uiso 1 1 calc R . . H4B H 0.8929 0.3555 0.2294 0.127 Uiso 1 1 calc R . . H4C H 0.9830 0.3313 0.1943 0.127 Uiso 1 1 calc R . . C5 C 0.3018(5) 1.0742(7) 0.1763(3) 0.0367(16) Uani 1 1 d . . . C6 C 0.2408(7) 1.2014(9) 0.1833(3) 0.056(2) Uani 1 1 d . . . H6A H 0.1903 1.2347 0.1584 0.067 Uiso 1 1 calc R . . C7 C 0.2575(9) 1.2781(10) 0.2290(4) 0.068(3) Uani 1 1 d . . . H7A H 0.2179 1.3655 0.2352 0.081 Uiso 1 1 calc R . . C8 C 0.3300(9) 1.2280(10) 0.2644(4) 0.066(3) Uani 1 1 d . . . H8A H 0.3413 1.2821 0.2948 0.079 Uiso 1 1 calc R . . C9 C 0.3868(7) 1.1002(10) 0.2567(3) 0.060(2) Uani 1 1 d . . . H9A H 0.4359 1.0650 0.2820 0.072 Uiso 1 1 calc R . . C10 C 0.3730(6) 1.0226(8) 0.2122(3) 0.047(2) Uani 1 1 d . . . H10A H 0.4125 0.9346 0.2066 0.056 Uiso 1 1 calc R . . C11 C 0.4006(5) 0.8485(7) 0.1036(3) 0.0315(15) Uani 1 1 d . . . C12 C 0.4081(6) 0.7029(7) 0.1239(3) 0.0359(16) Uani 1 1 d . . . H12A H 0.3595 0.6672 0.1450 0.043 Uiso 1 1 calc R . . C13 C 0.4891(6) 0.6106(8) 0.1125(3) 0.0442(19) Uani 1 1 d . . . H13A H 0.4956 0.5103 0.1257 0.053 Uiso 1 1 calc R . . C14 C 0.5601(6) 0.6644(8) 0.0821(3) 0.045(2) Uani 1 1 d . . . H14A H 0.6155 0.6011 0.0749 0.055 Uiso 1 1 calc R . . C15 C 0.5514(5) 0.8083(8) 0.0622(3) 0.0397(18) Uani 1 1 d . . . H15A H 0.6000 0.8432 0.0409 0.048 Uiso 1 1 calc R . . C16 C 0.4716(5) 0.9033(7) 0.0730(3) 0.0354(16) Uani 1 1 d . . . H16A H 0.4657 1.0036 0.0597 0.042 Uiso 1 1 calc R . . C17 C 0.2620(5) 1.1232(7) 0.0639(3) 0.0295(15) Uani 1 1 d . . . C18 C 0.3226(5) 1.2538(7) 0.0664(3) 0.0359(16) Uani 1 1 d . . . H18A H 0.3766 1.2637 0.0919 0.043 Uiso 1 1 calc R . . C19 C 0.3045(6) 1.3693(8) 0.0319(3) 0.0412(18) Uani 1 1 d . . . H19A H 0.3466 1.4574 0.0331 0.049 Uiso 1 1 calc R . . C20 C 0.2241(6) 1.3543(8) -0.0041(3) 0.0403(18) Uani 1 1 d . . . H20A H 0.2100 1.4344 -0.0273 0.048 Uiso 1 1 calc R . . C21 C 0.1631(6) 1.2238(8) -0.0072(3) 0.0395(17) Uani 1 1 d . . . H21A H 0.1083 1.2147 -0.0323 0.047 Uiso 1 1 calc R . . C22 C 0.1834(5) 1.1077(7) 0.0270(3) 0.0355(17) Uani 1 1 d . . . H22A H 0.1432 1.0175 0.0250 0.043 Uiso 1 1 calc R . . C23 C 0.1706(5) 0.8339(7) 0.1110(3) 0.0298(15) Uani 1 1 d . . . C24 C 0.1641(5) 0.7222(8) 0.0749(3) 0.0360(16) Uani 1 1 d . . . H24A H 0.2137 0.7160 0.0516 0.043 Uiso 1 1 calc R . . C25 C 0.0836(5) 0.6190(8) 0.0733(3) 0.0416(18) Uani 1 1 d . . . H25A H 0.0773 0.5421 0.0485 0.050 Uiso 1 1 calc R . . C26 C 0.0132(5) 0.6284(8) 0.1075(3) 0.0412(18) Uani 1 1 d . . . H26A H -0.0404 0.5556 0.1069 0.049 Uiso 1 1 calc R . . C27 C 0.0194(5) 0.7422(8) 0.1427(3) 0.0394(17) Uani 1 1 d . . . H27A H -0.0312 0.7496 0.1654 0.047 Uiso 1 1 calc R . . C28 C 0.0992(5) 0.8458(8) 0.1451(3) 0.0378(17) Uani 1 1 d . . . H28A H 0.1046 0.9234 0.1697 0.045 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 Ir1 0.03978(16) 0.02065(13) 0.02934(17) 0.00141(10) 0.01294(12) 0.00033(10) I1 0.0389(3) 0.0329(2) 0.0387(3) -0.00255(19) 0.0150(2) -0.00438(18) I2 0.0431(3) 0.0297(2) 0.0434(3) 0.0077(2) 0.0039(2) -0.00047(19) I3 0.0674(4) 0.0365(3) 0.0608(4) 0.0051(2) 0.0408(3) 0.0024(2) As1 0.0346(4) 0.0223(3) 0.0282(4) -0.0021(3) 0.0068(3) -0.0013(3) O1 0.058(3) 0.029(3) 0.067(4) -0.008(3) 0.026(3) -0.003(2) O2 0.054(3) 0.026(2) 0.062(4) 0.001(2) 0.012(3) 0.000(2) O3 0.073(4) 0.051(3) 0.045(4) 0.016(3) 0.007(3) 0.012(3) C1 0.046(4) 0.034(4) 0.035(4) 0.007(3) 0.015(3) -0.003(3) C2 0.032(4) 0.027(3) 0.034(4) 0.006(3) 0.005(3) -0.004(3) C3 0.051(5) 0.028(3) 0.057(6) 0.004(3) 0.024(4) 0.006(3) C4 0.132(10) 0.066(6) 0.054(7) -0.005(5) -0.007(7) -0.017(6) C5 0.050(4) 0.032(3) 0.030(4) -0.006(3) 0.014(3) -0.007(3) C6 0.067(6) 0.049(5) 0.053(6) -0.007(4) 0.012(5) 0.012(4) C7 0.096(8) 0.049(5) 0.060(7) -0.024(5) 0.020(6) 0.003(5) C8 0.109(8) 0.052(5) 0.040(6) -0.019(4) 0.018(6) -0.019(5) C9 0.087(7) 0.060(5) 0.034(5) -0.001(4) 0.008(5) -0.020(5) C10 0.076(6) 0.039(4) 0.027(4) -0.008(3) 0.009(4) -0.007(4) C11 0.033(4) 0.028(3) 0.033(4) -0.007(3) 0.001(3) 0.001(3) C12 0.044(4) 0.029(3) 0.033(4) 0.004(3) -0.003(3) -0.007(3) C13 0.048(5) 0.033(4) 0.049(5) -0.006(3) -0.010(4) 0.005(3) C14 0.035(4) 0.043(4) 0.056(6) -0.008(4) -0.003(4) 0.011(3) C15 0.032(4) 0.044(4) 0.043(5) -0.002(3) 0.004(3) 0.005(3) C16 0.040(4) 0.032(3) 0.034(4) 0.002(3) 0.006(3) 0.000(3) C17 0.029(3) 0.030(3) 0.031(4) -0.002(3) 0.008(3) -0.003(3) C18 0.046(4) 0.027(3) 0.035(4) -0.003(3) 0.000(3) -0.001(3) C19 0.055(5) 0.029(3) 0.041(5) 0.003(3) 0.009(4) 0.001(3) C20 0.049(5) 0.039(4) 0.034(5) 0.012(3) 0.013(4) 0.012(3) C21 0.043(4) 0.045(4) 0.032(4) 0.005(3) 0.010(3) 0.006(3) C22 0.028(4) 0.033(3) 0.048(5) 0.003(3) 0.017(3) 0.003(3) C23 0.033(4) 0.025(3) 0.032(4) 0.000(3) 0.005(3) 0.000(3) C24 0.033(4) 0.041(4) 0.036(4) -0.003(3) 0.012(3) -0.002(3) C25 0.035(4) 0.041(4) 0.050(5) -0.009(3) 0.010(4) -0.005(3) C26 0.034(4) 0.043(4) 0.047(5) 0.001(4) 0.003(4) -0.006(3) C27 0.036(4) 0.044(4) 0.040(5) 0.001(3) 0.014(3) 0.001(3) C28 0.045(4) 0.032(3) 0.038(5) -0.003(3) 0.007(4) 0.000(3) 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' O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' As As 0.0499 2.0058 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' I I -0.4742 1.8119 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' Ir Ir -1.4442 7.9887 '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 _geom_angle_site_symmetry_1 _geom_angle_site_symmetry_3 _geom_angle_publ_flag C1 Ir1 C2 177.0(3) . . ? C1 Ir1 C3 94.0(3) . . ? C2 Ir1 C3 87.9(3) . . ? C1 Ir1 I3 88.08(19) . . ? C2 Ir1 I3 89.63(18) . . ? C3 Ir1 I3 89.68(19) . . ? C1 Ir1 I1 93.54(19) . . ? C2 Ir1 I1 88.83(18) . . ? C3 Ir1 I1 87.82(19) . . ? I3 Ir1 I1 177.108(19) . . ? C1 Ir1 I2 87.7(2) . . ? C2 Ir1 I2 90.5(2) . . ? C3 Ir1 I2 177.82(19) . . ? I3 Ir1 I2 91.76(2) . . ? I1 Ir1 I2 90.698(17) . . ? C17 As1 C11 111.4(3) . . ? C17 As1 C23 110.0(3) . . ? C11 As1 C23 106.0(3) . . ? C17 As1 C5 107.3(3) . . ? C11 As1 C5 111.1(3) . . ? C23 As1 C5 111.1(3) . . ? O1 C1 Ir1 177.7(7) . . ? O2 C2 Ir1 179.1(6) . . ? O3 C3 C4 124.5(9) . . ? O3 C3 Ir1 119.2(6) . . ? C4 C3 Ir1 116.1(6) . . ? C3 C4 H4A 109.5 . . ? C3 C4 H4B 109.5 . . ? H4A C4 H4B 109.5 . . ? C3 C4 H4C 109.5 . . ? H4A C4 H4C 109.5 . . ? H4B C4 H4C 109.5 . . ? C10 C5 C6 122.2(7) . . ? C10 C5 As1 119.6(5) . . ? C6 C5 As1 118.2(6) . . ? C5 C6 C7 117.0(9) . . ? C5 C6 H6A 121.5 . . ? C7 C6 H6A 121.5 . . ? C8 C7 C6 120.6(9) . . ? C8 C7 H7A 119.7 . . ? C6 C7 H7A 119.7 . . ? C7 C8 C9 120.8(8) . . ? C7 C8 H8A 119.6 . . ? C9 C8 H8A 119.6 . . ? C8 C9 C10 120.2(9) . . ? C8 C9 H9A 119.9 . . ? C10 C9 H9A 119.9 . . ? C5 C10 C9 119.2(8) . . ? C5 C10 H10A 120.4 . . ? C9 C10 H10A 120.4 . . ? C16 C11 C12 121.7(6) . . ? C16 C11 As1 118.9(5) . . ? C12 C11 As1 119.2(5) . . ? C11 C12 C13 118.2(7) . . ? C11 C12 H12A 120.9 . . ? C13 C12 H12A 120.9 . . ? C14 C13 C12 120.4(7) . . ? C14 C13 H13A 119.8 . . ? C12 C13 H13A 119.8 . . ? C15 C14 C13 120.7(7) . . ? C15 C14 H14A 119.6 . . ? C13 C14 H14A 119.6 . . ? C14 C15 C16 120.2(7) . . ? C14 C15 H15A 119.9 . . ? C16 C15 H15A 119.9 . . ? C11 C16 C15 118.7(6) . . ? C11 C16 H16A 120.6 . . ? C15 C16 H16A 120.6 . . ? C22 C17 C18 120.3(6) . . ? C22 C17 As1 120.3(5) . . ? C18 C17 As1 119.4(5) . . ? C19 C18 C17 120.4(7) . . ? C19 C18 H18A 119.8 . . ? C17 C18 H18A 119.8 . . ? C20 C19 C18 118.9(7) . . ? C20 C19 H19A 120.6 . . ? C18 C19 H19A 120.6 . . ? C19 C20 C21 121.4(7) . . ? C19 C20 H20A 119.3 . . ? C21 C20 H20A 119.3 . . ? C22 C21 C20 119.1(7) . . ? C22 C21 H21A 120.5 . . ? C20 C21 H21A 120.5 . . ? C17 C22 C21 120.0(6) . . ? C17 C22 H22A 120.0 . . ? C21 C22 H22A 120.0 . . ? C28 C23 C24 121.8(6) . . ? C28 C23 As1 120.2(5) . . ? C24 C23 As1 118.0(5) . . ? C23 C24 C25 118.7(6) . . ? C23 C24 H24A 120.7 . . ? C25 C24 H24A 120.7 . . ? C26 C25 C24 120.0(7) . . ? C26 C25 H25A 120.0 . . ? C24 C25 H25A 120.0 . . ? C25 C26 C27 120.7(7) . . ? C25 C26 H26A 119.6 . . ? C27 C26 H26A 119.6 . . ? C26 C27 C28 120.3(6) . . ? C26 C27 H27A 119.9 . . ? C28 C27 H27A 119.9 . . ? C23 C28 C27 118.5(6) . . ? C23 C28 H28A 120.7 . . ? C27 C28 H28A 120.7 . . ? loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_site_symmetry_2 _geom_bond_publ_flag Ir1 C1 1.925(7) . ? Ir1 C2 1.932(6) . ? Ir1 C3 2.108(9) . ? Ir1 I3 2.6830(5) . ? Ir1 I1 2.6907(5) . ? Ir1 I2 2.8248(6) . ? As1 C17 1.902(7) . ? As1 C11 1.909(6) . ? As1 C23 1.916(6) . ? As1 C5 1.917(7) . ? O1 C1 1.111(8) . ? O2 C2 1.128(7) . ? O3 C3 1.174(8) . ? C3 C4 1.494(11) . ? C4 H4A 0.9800 . ? C4 H4B 0.9800 . ? C4 H4C 0.9800 . ? C5 C10 1.364(11) . ? C5 C6 1.397(10) . ? C6 C7 1.409(12) . ? C6 H6A 0.9500 . ? C7 C8 1.362(14) . ? C7 H7A 0.9500 . ? C8 C9 1.374(12) . ? C8 H8A 0.9500 . ? C9 C10 1.383(10) . ? C9 H9A 0.9500 . ? C10 H10A 0.9500 . ? C11 C16 1.390(9) . ? C11 C12 1.390(9) . ? C12 C13 1.395(10) . ? C12 H12A 0.9500 . ? C13 C14 1.385(11) . ? C13 H13A 0.9500 . ? C14 C15 1.372(10) . ? C14 H14A 0.9500 . ? C15 C16 1.393(9) . ? C15 H15A 0.9500 . ? C16 H16A 0.9500 . ? C17 C22 1.379(10) . ? C17 C18 1.393(9) . ? C18 C19 1.382(9) . ? C18 H18A 0.9500 . ? C19 C20 1.380(11) . ? C19 H19A 0.9500 . ? C20 C21 1.395(10) . ? C20 H20A 0.9500 . ? C21 C22 1.385(10) . ? C21 H21A 0.9500 . ? C22 H22A 0.9500 . ? C23 C28 1.382(9) . ? C23 C24 1.383(9) . ? C24 C25 1.391(9) . ? C24 H24A 0.9500 . ? C25 C26 1.372(10) . ? C25 H25A 0.9500 . ? C26 C27 1.378(10) . ? C26 H26A 0.9500 . ? C27 C28 1.385(9) . ? C27 H27A 0.9500 . ? C28 H28A 0.9500 . ?