#------------------------------------------------------------------------------ #$Date: 2016-08-07 11:19:22 +0300 (Sun, 07 Aug 2016) $ #$Revision: 185212 $ #$URL: file:///home/coder/svn-repositories/cod/cif/7/22/52/7225201.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_7225201 loop_ _publ_author_name 'Veerakanellore, Giri Babu' 'Captain, Burjor' 'Ramamurthy, V.' _publ_section_title ; Solid-state photochemistry of cis-cinnamic acids: a competition between [2 + 2] addition and cis--trans isomerization ; _journal_issue 25 _journal_name_full CrystEngComm _journal_page_first 4708 _journal_paper_doi 10.1039/C6CE00682E _journal_volume 18 _journal_year 2016 _chemical_formula_sum 'C31 H32 O6' _chemical_formula_weight 500.56 _space_group_crystal_system triclinic _space_group_IT_number 2 _space_group_name_Hall '-P 1' _space_group_name_H-M_alt 'P -1' _symmetry_space_group_name_Hall '-P 1' _symmetry_space_group_name_H-M 'P -1' _atom_sites_solution_hydrogens geom _audit_creation_method SHELXL-2014/7 _audit_update_record ; 2016-03-10 deposited with the CCDC. 2016-05-11 downloaded from the CCDC. ; _cell_angle_alpha 75.7190(10) _cell_angle_beta 82.6330(10) _cell_angle_gamma 69.6770(10) _cell_formula_units_Z 1 _cell_length_a 8.3783(4) _cell_length_b 9.3392(5) _cell_length_c 9.5107(5) _cell_measurement_reflns_used 5751 _cell_measurement_temperature 296(2) _cell_measurement_theta_max 30.28 _cell_measurement_theta_min 2.38 _cell_volume 675.55(6) _computing_cell_refinement 'SAINT+ V8.34A (Bruker, 2015)' _computing_data_collection 'APEX2 v2.2-0 (Bruker, 2007)' _computing_data_reduction 'SAINT+ V8.34A (Bruker, 2015)' _computing_molecular_graphics 'XSHELL v6.3.1 (Bruker, 2004)' _computing_publication_material 'XCIF v2014/2 (Bruker, 2014)' _computing_structure_refinement 'SHELXL-2014/7 (Sheldrick, 2014)' _computing_structure_solution 'SHELXS/SHELXTL V6.14 (Bruker, 2015)' _diffrn_ambient_temperature 296(2) _diffrn_measured_fraction_theta_full 1.000 _diffrn_measured_fraction_theta_max 0.999 _diffrn_measurement_device_type 'Bruker SMART APEX2 CCD diffractometer' _diffrn_measurement_method 'omega scans' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.0187 _diffrn_reflns_av_unetI/netI 0.0170 _diffrn_reflns_Laue_measured_fraction_full 1.000 _diffrn_reflns_Laue_measured_fraction_max 0.999 _diffrn_reflns_limit_h_max 11 _diffrn_reflns_limit_h_min -11 _diffrn_reflns_limit_k_max 12 _diffrn_reflns_limit_k_min -12 _diffrn_reflns_limit_l_max 12 _diffrn_reflns_limit_l_min -12 _diffrn_reflns_number 9178 _diffrn_reflns_point_group_measured_fraction_full 1.000 _diffrn_reflns_point_group_measured_fraction_max 0.999 _diffrn_reflns_theta_full 25.242 _diffrn_reflns_theta_max 27.995 _diffrn_reflns_theta_min 2.212 _exptl_absorpt_coefficient_mu 0.085 _exptl_absorpt_correction_T_max 0.7460 _exptl_absorpt_correction_T_min 0.7014 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details '(SADABS 2014/5 Bruker)' _exptl_crystal_colour colourless _exptl_crystal_density_diffrn 1.230 _exptl_crystal_description Block _exptl_crystal_F_000 266 _exptl_crystal_size_max 0.50 _exptl_crystal_size_mid 0.30 _exptl_crystal_size_min 0.16 _refine_diff_density_max 0.299 _refine_diff_density_min -0.214 _refine_diff_density_rms 0.054 _refine_ls_extinction_coef 0.179(14) _refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^ _refine_ls_extinction_method 'SHELXL-2014/7 (Sheldrick 2014' _refine_ls_goodness_of_fit_ref 1.045 _refine_ls_hydrogen_treatment constr _refine_ls_matrix_type full _refine_ls_number_parameters 191 _refine_ls_number_reflns 3260 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.045 _refine_ls_R_factor_all 0.0536 _refine_ls_R_factor_gt 0.0483 _refine_ls_shift/su_max 0.000 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'w=1/[\s^2^(Fo^2^)+(0.0766P)^2^+0.1044P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.1307 _refine_ls_wR_factor_ref 0.1376 _reflns_Friedel_coverage 0.000 _reflns_number_gt 2827 _reflns_number_total 3260 _reflns_threshold_expression 'I > 2\s(I)' _cod_data_source_file c6ce00682e2.cif _cod_data_source_block collect_0m _cod_depositor_comments ; The following automatic conversions were performed: '_exptl_absorpt_correction_type' value 'Multi-scan' changed to 'multi-scan' according to /usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/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 4268 2015-11-12 08:31:59Z antanas Adding full bibliography for 7225194--7225202.cif. ; _cod_database_code 7225201 _shelx_shelxl_version_number 2014/7 _shelx_space_group_comment ; The symmetry employed for this shelxl refinement is uniquely defined by the following loop, which should always be used as a source of symmetry information in preference to the above space-group names. They are only intended as comments. ; _shelx_res_file ; collect_0m.res created by SHELXL-2014/7 TITL collect_0m in P-1 CELL 0.71073 8.3783 9.3392 9.5107 75.719 82.633 69.677 ZERR 1.00 0.0004 0.0005 0.0005 0.001 0.001 0.001 LATT 1 SFAC C H O UNIT 31 32 6 OMIT -3 56 L.S. 12 ACTA BOND FMAP 2 PLAN 20 EADP C21 C21b EXYZ C21 C21b WGHT 0.076600 0.104400 EXTI 0.178783 FVAR 0.50551 0.12694 PART 4 MOLE 1 O1 3 0.300852 1.066713 0.554755 11.00000 0.02665 0.05200 = 0.06961 -0.02555 -0.00120 -0.01132 O2 3 0.401122 0.936423 0.377404 11.00000 0.02569 0.06311 = 0.08211 -0.03808 0.00372 -0.00995 AFIX 147 H2 2 0.492845 0.933962 0.401254 11.00000 -1.50000 AFIX 0 O3 3 0.200147 0.583725 0.427934 11.00000 0.06630 0.03001 = 0.07230 -0.01709 0.00319 -0.00684 C1 1 0.170073 0.736348 0.599354 11.00000 0.02681 0.02905 = 0.06020 -0.00702 -0.00034 -0.00552 C2 1 0.242758 0.591686 0.559360 11.00000 0.04186 0.03044 = 0.06194 -0.00795 0.00766 -0.00500 C3 1 0.351737 0.464976 0.652508 11.00000 0.06244 0.03401 = 0.08069 -0.00358 0.00644 0.00753 AFIX 43 H3 2 0.401103 0.369486 0.625131 11.00000 -1.20000 AFIX 0 C4 1 0.386110 0.480822 0.783823 11.00000 0.06559 0.05540 = 0.07368 0.00709 -0.00898 0.01096 AFIX 43 H4 2 0.457823 0.395512 0.845246 11.00000 -1.20000 AFIX 0 C5 1 0.316100 0.620830 0.825710 11.00000 0.05757 0.06545 = 0.06551 -0.00416 -0.01441 -0.00067 AFIX 43 H5 2 0.339150 0.630855 0.915224 11.00000 -1.20000 AFIX 0 C6 1 0.209955 0.747850 0.732293 11.00000 0.04104 0.04428 = 0.06449 -0.01078 -0.00908 -0.00448 AFIX 43 H6 2 0.164358 0.843431 0.759918 11.00000 -1.20000 AFIX 0 C7 1 0.048608 0.872389 0.501722 11.00000 0.02440 0.02682 = 0.05465 -0.01263 -0.00303 -0.00619 AFIX 13 H7 2 0.008311 0.834900 0.430029 11.00000 -1.20000 AFIX 0 C8 1 0.104920 1.019018 0.423847 11.00000 0.02432 0.02934 = 0.05048 -0.01057 -0.00268 -0.00635 AFIX 13 H8 2 0.093558 1.042766 0.318603 11.00000 -1.20000 AFIX 0 C9 1 0.277427 1.011255 0.459398 11.00000 0.02563 0.02823 = 0.05611 -0.00946 -0.00033 -0.00777 C10 1 0.237797 0.429956 0.401536 11.00000 0.08714 0.03525 = 0.08525 -0.02383 0.01920 -0.01742 AFIX 23 H10A 2 0.198297 0.364654 0.484590 11.00000 -1.20000 H10B 2 0.359957 0.382281 0.387709 11.00000 -1.20000 AFIX 0 C11 1 0.153443 0.441296 0.272029 11.00000 0.08714 0.06038 = 0.11006 -0.03480 0.01528 -0.03437 AFIX 43 H11 2 0.040946 0.506922 0.263011 11.00000 -1.20000 AFIX 0 C12 1 0.221598 0.367961 0.168658 11.00000 0.13859 0.09800 = 0.09803 -0.04604 0.02106 -0.05646 AFIX 93 H12A 2 0.333821 0.301141 0.173268 11.00000 -1.20000 H12B 2 0.158303 0.382134 0.089841 11.00000 -1.20000 PART -1 AFIX 66 C21 1 0.133193 0.999810 0.996093 10.50000 0.17477 0.08821 = 0.08123 -0.05008 0.00511 -0.02610 C22 1 0.076847 0.885083 1.089295 10.50000 0.16244 0.05045 = 0.05383 -0.00994 -0.02761 0.00574 AFIX 43 H22 2 0.151178 0.804985 1.153086 10.50000 -1.20000 AFIX 65 C23 1 -0.090594 0.890072 1.087153 10.50000 0.28902 0.07816 = 0.07923 -0.01964 0.01626 -0.05202 AFIX 43 H23 2 -0.128292 0.813312 1.149511 10.50000 -1.20000 AFIX 65 C24 1 -0.201690 1.009788 0.991808 10.50000 0.23149 0.18199 = 0.12661 -0.09397 0.04078 -0.07262 AFIX 43 H24 2 -0.313719 1.013126 0.990376 10.50000 -1.20000 AFIX 65 C25 1 -0.145347 1.124516 0.898606 10.50000 0.18876 0.11980 = 0.08681 -0.05370 -0.04437 0.03369 AFIX 43 H25 2 -0.219678 1.204614 0.834814 10.50000 -1.20000 AFIX 65 C26 1 0.022093 1.119529 0.900747 10.50000 0.20557 0.10905 = 0.11120 -0.06636 -0.06882 0.06430 AFIX 43 H26 2 0.059791 1.196290 0.838388 10.50000 -1.20000 AFIX 0 C27 1 0.299111 1.004678 0.980135 10.50000 0.19658 0.19421 = 0.15763 -0.10708 0.04778 -0.09198 AFIX 137 H27A 2 0.340531 0.989703 1.074030 10.50000 -1.50000 H27B 2 0.299943 1.104427 0.922231 10.50000 -1.50000 H27C 2 0.371100 0.923254 0.933157 10.50000 -1.50000 PART AFIX 0 HKLF 4 REM collect_0m in P-1 REM R1 = 0.0483 for 2827 Fo > 4sig(Fo) and 0.0536 for all 3260 data REM 191 parameters refined using 0 restraints END WGHT 0.0768 0.1038 REM Highest difference peak 0.299, deepest hole -0.214, 1-sigma level 0.054 Q1 1 0.2406 0.4613 0.2162 11.00000 0.05 0.30 Q2 1 -0.0295 0.9175 0.5426 11.00000 0.05 0.27 Q3 1 0.1075 0.7979 0.5538 11.00000 0.05 0.23 Q4 1 0.1842 1.0161 0.4422 11.00000 0.05 0.22 Q5 1 0.0902 0.9377 0.4591 11.00000 0.05 0.20 Q6 1 0.2037 0.6677 0.5812 11.00000 0.05 0.19 Q7 1 0.4392 0.2889 0.1837 11.00000 0.05 0.17 Q8 1 0.1198 0.6275 0.3970 11.00000 0.05 0.16 Q9 1 0.5145 0.2921 0.1367 11.00000 0.05 0.16 Q10 1 0.0307 0.7313 0.8912 11.00000 0.05 0.16 Q11 1 0.2718 0.6889 0.7878 11.00000 0.05 0.15 Q12 1 0.0312 0.8632 0.3981 11.00000 0.05 0.15 Q13 1 -0.0257 1.1535 0.8727 11.00000 0.05 0.14 Q14 1 0.1570 0.7247 0.6788 11.00000 0.05 0.13 Q15 1 0.2105 0.7360 0.6551 11.00000 0.05 0.13 Q16 1 0.1102 0.8183 0.8172 11.00000 0.05 0.13 Q17 1 0.4003 0.6664 0.9162 11.00000 0.05 0.13 Q18 1 0.0920 0.7408 1.0358 11.00000 0.05 0.12 Q19 1 0.0584 0.8921 1.0368 11.00000 0.05 0.12 Q20 1 0.1165 1.0049 0.3359 11.00000 0.05 0.12 ; _shelx_res_checksum 33425 loop_ _space_group_symop_operation_xyz 'x, y, z' '-x, -y, -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_site_symmetry_order _atom_site_calc_flag _atom_site_refinement_flags_posn _atom_site_refinement_flags_adp _atom_site_refinement_flags_occupancy _atom_site_disorder_assembly _atom_site_disorder_group O1 O 0.30085(9) 1.06671(10) 0.55475(10) 0.0477(2) Uani 1 1 d . . . A 4 O2 O 0.40112(10) 0.93642(11) 0.37740(11) 0.0547(3) Uani 1 1 d . . . A 4 H2 H 0.4928 0.9340 0.4013 0.082 Uiso 1 1 calc R U . A 4 O3 O 0.20015(13) 0.58372(9) 0.42793(11) 0.0581(3) Uani 1 1 d . . . A 4 C1 C 0.17007(12) 0.73635(12) 0.59935(13) 0.0403(3) Uani 1 1 d . . . A 4 C2 C 0.24276(15) 0.59169(13) 0.55936(14) 0.0479(3) Uani 1 1 d . . . A 4 C3 C 0.3517(2) 0.46498(16) 0.65251(18) 0.0679(4) Uani 1 1 d . . . A 4 H3 H 0.4011 0.3695 0.6251 0.082 Uiso 1 1 calc R U . A 4 C4 C 0.3861(2) 0.48082(19) 0.78382(19) 0.0766(5) Uani 1 1 d . . . A 4 H4 H 0.4578 0.3955 0.8452 0.092 Uiso 1 1 calc R U . A 4 C5 C 0.3161(2) 0.6208(2) 0.82571(18) 0.0689(4) Uani 1 1 d . . . A 4 H5 H 0.3391 0.6309 0.9152 0.083 Uiso 1 1 calc R U . A 4 C6 C 0.20996(16) 0.74785(15) 0.73229(15) 0.0521(3) Uani 1 1 d . . . A 4 H6 H 0.1644 0.8434 0.7599 0.062 Uiso 1 1 calc R U . A 4 C7 C 0.04861(12) 0.87239(11) 0.50172(12) 0.0351(2) Uani 1 1 d . . . A 4 H7 H 0.0083 0.8349 0.4300 0.042 Uiso 1 1 calc R U . A 4 C8 C 0.10492(11) 1.01902(11) 0.42385(12) 0.0349(2) Uani 1 1 d . . . A 4 H8 H 0.0936 1.0428 0.3186 0.042 Uiso 1 1 calc R U . A 4 C9 C 0.27743(12) 1.01126(11) 0.45940(12) 0.0370(2) Uani 1 1 d . . . A 4 C10 C 0.2378(2) 0.42996(16) 0.40154(19) 0.0701(4) Uani 1 1 d . . . A 4 H10A H 0.1983 0.3647 0.4846 0.084 Uiso 1 1 calc R U . A 4 H10B H 0.3600 0.3823 0.3877 0.084 Uiso 1 1 calc R U . A 4 C11 C 0.1534(3) 0.4413(2) 0.2720(2) 0.0820(5) Uani 1 1 d . . . A 4 H11 H 0.0409 0.5069 0.2630 0.098 Uiso 1 1 calc R U . A 4 C12 C 0.2216(4) 0.3680(3) 0.1687(3) 0.1047(7) Uani 1 1 d . . . A 4 H12A H 0.3338 0.3011 0.1733 0.126 Uiso 1 1 calc R U . A 4 H12B H 0.1583 0.3821 0.0898 0.126 Uiso 1 1 calc R U . A 4 C21 C 0.1332(9) 0.9998(7) 0.9961(7) 0.115(3) Uani 0.5 1 d G . P B -1 C22 C 0.0768(11) 0.8851(6) 1.0893(6) 0.098(3) Uani 0.5 1 d G . P B -1 H22 H 0.1512 0.8050 1.1531 0.118 Uiso 0.5 1 calc R U P B -1 C23 C -0.0906(12) 0.8901(10) 1.0872(9) 0.153(5) Uani 0.5 1 d G . P B -1 H23 H -0.1283 0.8133 1.1495 0.183 Uiso 0.5 1 calc R U P B -1 C24 C -0.2017(10) 1.0098(13) 0.9918(11) 0.172(6) Uani 0.5 1 d G . P B -1 H24 H -0.3137 1.0131 0.9904 0.207 Uiso 0.5 1 calc R U P B -1 C25 C -0.1453(11) 1.1245(10) 0.8986(9) 0.145(6) Uani 0.5 1 d G . P B -1 H25 H -0.2197 1.2046 0.8348 0.174 Uiso 0.5 1 calc R U P B -1 C26 C 0.0221(11) 1.1195(7) 0.9007(7) 0.160(6) Uani 0.5 1 d G . P B -1 H26 H 0.0598 1.1963 0.8384 0.192 Uiso 0.5 1 calc R U P B -1 C27 C 0.2991(13) 1.0047(16) 0.9801(13) 0.168(5) Uani 0.5 1 d . . P B -1 H27A H 0.3405 0.9897 1.0740 0.252 Uiso 0.5 1 calc R U P B -1 H27B H 0.2999 1.1044 0.9222 0.252 Uiso 0.5 1 calc R U P B -1 H27C H 0.3711 0.9233 0.9332 0.252 Uiso 0.5 1 calc R U P B -1 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 O1 0.0267(4) 0.0520(5) 0.0696(5) -0.0255(4) -0.0012(3) -0.0113(3) O2 0.0257(4) 0.0631(6) 0.0821(6) -0.0381(5) 0.0037(4) -0.0100(4) O3 0.0663(6) 0.0300(4) 0.0723(6) -0.0171(4) 0.0032(5) -0.0068(4) C1 0.0268(4) 0.0291(5) 0.0602(7) -0.0070(4) -0.0003(4) -0.0055(4) C2 0.0419(6) 0.0304(5) 0.0619(7) -0.0080(5) 0.0077(5) -0.0050(4) C3 0.0624(8) 0.0340(6) 0.0807(10) -0.0036(6) 0.0064(7) 0.0075(6) C4 0.0656(9) 0.0554(8) 0.0737(10) 0.0071(7) -0.0090(7) 0.0110(7) C5 0.0576(8) 0.0655(9) 0.0655(9) -0.0042(7) -0.0144(7) -0.0007(7) C6 0.0410(6) 0.0443(6) 0.0645(7) -0.0108(5) -0.0091(5) -0.0045(5) C7 0.0244(4) 0.0268(4) 0.0547(6) -0.0126(4) -0.0030(4) -0.0062(3) C8 0.0243(4) 0.0293(4) 0.0505(5) -0.0106(4) -0.0027(4) -0.0063(3) C9 0.0256(4) 0.0282(4) 0.0561(6) -0.0095(4) -0.0003(4) -0.0078(3) C10 0.0871(11) 0.0353(6) 0.0852(10) -0.0238(6) 0.0192(8) -0.0174(7) C11 0.0871(12) 0.0604(9) 0.1101(14) -0.0348(9) 0.0153(10) -0.0344(9) C12 0.139(2) 0.0980(15) 0.0980(15) -0.0460(13) 0.0211(14) -0.0565(15) C21 0.175(7) 0.088(4) 0.081(4) -0.050(4) 0.005(4) -0.026(4) C22 0.162(9) 0.050(3) 0.054(2) -0.0099(19) -0.028(4) 0.006(4) C23 0.289(16) 0.078(5) 0.079(5) -0.020(3) 0.016(6) -0.052(7) C24 0.231(17) 0.182(14) 0.127(10) -0.094(10) 0.041(11) -0.073(13) C25 0.189(11) 0.120(7) 0.087(5) -0.054(5) -0.044(5) 0.034(6) C26 0.206(11) 0.109(6) 0.111(6) -0.066(5) -0.069(7) 0.064(6) C27 0.197(10) 0.194(10) 0.158(9) -0.107(8) 0.048(7) -0.092(9) 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' 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 C2 O3 C10 116.76(11) . . C6 C1 C2 117.79(11) . . C6 C1 C7 121.78(10) . . C2 C1 C7 120.40(11) . . O3 C2 C3 123.61(11) . . O3 C2 C1 116.42(10) . . C3 C2 C1 119.97(13) . . C4 C3 C2 120.37(13) . . C5 C4 C3 120.79(13) . . C4 C5 C6 119.01(15) . . C1 C6 C5 122.06(13) . . C1 C7 C8 117.11(9) . 2_576 C1 C7 C8 119.25(8) . . C8 C7 C8 89.28(7) 2_576 . C9 C8 C7 115.62(8) . 2_576 C9 C8 C7 115.41(8) . . C7 C8 C7 90.72(7) 2_576 . O1 C9 O2 123.50(9) . . O1 C9 C8 123.70(9) . . O2 C9 C8 112.79(9) . . O3 C10 C11 109.49(14) . . C12 C11 C10 125.7(2) . . C22 C21 C26 120.0 . . C22 C21 C27 126.3(7) . . C26 C21 C27 113.6(7) . . C23 C22 C21 120.0 . . C22 C23 C24 120.0 . . C23 C24 C25 120.0 . . C26 C25 C24 120.0 . . C25 C26 C21 120.0 . . loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_site_symmetry_2 O1 C9 1.2154(14) . O2 C9 1.3149(13) . O3 C2 1.3690(17) . O3 C10 1.4380(15) . C1 C6 1.3864(18) . C1 C2 1.4012(15) . C1 C7 1.5081(14) . C2 C3 1.3995(19) . C3 C4 1.370(3) . C4 C5 1.370(2) . C5 C6 1.3919(18) . C7 C8 1.5488(13) 2_576 C7 C8 1.5828(13) . C8 C9 1.4997(13) . C8 C7 1.5488(13) 2_576 C10 C11 1.461(3) . C11 C12 1.295(3) . C21 C22 1.3900 . C21 C26 1.3900 . C21 C27 1.394(13) . C22 C23 1.3900 . C23 C24 1.3900 . C24 C25 1.3900 . C25 C26 1.3900 .