#------------------------------------------------------------------------------ #$Date: 2014-07-12 07:06:18 +0300 (Sat, 12 Jul 2014) $ #$Revision: 120112 $ #$URL: file:///home/coder/svn-repositories/cod/cif/7/01/90/7019057.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_7019057 loop_ _publ_author_name 'Wright, Brian D.' 'Shah, Parth N.' 'McDonald, Lucas J.' 'Shaeffer, Michael L.' 'Wagers, Patrick O.' 'Panzner, Matthew J.' 'Smolen, Justin' 'Tagaev, Jasur' 'Tessier, Claire A.' 'Cannon, Carolyn L.' 'Youngs, Wiley J.' _publ_section_title ; Synthesis, characterization, and antimicrobial activity of silver carbene complexes derived from 4,5,6,7-tetrachlorobenzimidazole against antibiotic resistant bacteria. ; _journal_issue 21 _journal_name_full 'Dalton transactions (Cambridge, England : 2003)' _journal_page_first 6500 _journal_page_last 6506 _journal_volume 41 _journal_year 2012 _chemical_formula_moiety 'C7 H2 Cl4 N2' _chemical_formula_sum 'C7 H2 Cl4 N2' _chemical_formula_weight 255.91 _chemical_name_systematic ; ? ; _space_group_IT_number 2 _symmetry_cell_setting triclinic _symmetry_space_group_name_Hall '-P 1' _symmetry_space_group_name_H-M 'P -1' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_method SHELXL-97 _cell_angle_alpha 108.611(4) _cell_angle_beta 94.721(4) _cell_angle_gamma 90.265(4) _cell_formula_units_Z 8 _cell_length_a 7.4984(19) _cell_length_b 15.060(4) _cell_length_c 16.612(4) _cell_measurement_reflns_used 6123 _cell_measurement_temperature 100(2) _cell_measurement_theta_max 28.02 _cell_measurement_theta_min 2.22 _cell_volume 1770.8(8) _computing_cell_refinement 'Bruker SAINT' _computing_data_collection 'Bruker SMART' _computing_data_reduction 'Bruker SAINT' _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 100(2) _diffrn_measured_fraction_theta_full 0.977 _diffrn_measured_fraction_theta_max 0.977 _diffrn_measurement_device_type 'CCD area detector' _diffrn_measurement_method 'phi and omega 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 0.0275 _diffrn_reflns_av_sigmaI/netI 0.0438 _diffrn_reflns_limit_h_max 9 _diffrn_reflns_limit_h_min -9 _diffrn_reflns_limit_k_max 18 _diffrn_reflns_limit_k_min -18 _diffrn_reflns_limit_l_max 20 _diffrn_reflns_limit_l_min -20 _diffrn_reflns_number 13921 _diffrn_reflns_theta_full 26.30 _diffrn_reflns_theta_max 26.30 _diffrn_reflns_theta_min 1.30 _exptl_absorpt_coefficient_mu 1.280 _exptl_absorpt_correction_T_max 0.8827 _exptl_absorpt_correction_T_min 0.7974 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details SADABS _exptl_crystal_colour colorless _exptl_crystal_density_diffrn 1.920 _exptl_crystal_density_method 'not measured' _exptl_crystal_description plate _exptl_crystal_F_000 1008 _exptl_crystal_size_max 0.17 _exptl_crystal_size_mid 0.16 _exptl_crystal_size_min 0.10 _refine_diff_density_max 0.591 _refine_diff_density_min -0.447 _refine_diff_density_rms 0.116 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.084 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 485 _refine_ls_number_reflns 7025 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.084 _refine_ls_R_factor_all 0.0449 _refine_ls_R_factor_gt 0.0377 _refine_ls_shift/su_max 0.026 _refine_ls_shift/su_mean 0.002 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0692P)^2^+0.8804P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.1055 _refine_ls_wR_factor_ref 0.1227 _reflns_number_gt 6112 _reflns_number_total 7025 _reflns_threshold_expression >2sigma(I) _[local]_cod_data_source_file c2dt00055e.txt _[local]_cod_data_source_block bw4 _[local]_cod_cif_authors_sg_H-M 'P-1 ' _cod_depositor_comments ; The following automatic conversions were performed: '_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic' 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_values 1715 2011-07-08 13:25:40Z adriana ; _cod_original_cell_volume 1770.9(8) _cod_database_code 7019057 loop_ _symmetry_equiv_pos_as_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_symmetry_multiplicity _atom_site_calc_flag _atom_site_refinement_flags Cl1 Cl 0.89122(10) 0.19123(5) 1.12392(5) 0.02453(18) Uani 1 1 d . Cl2 Cl 0.71774(10) 0.00140(5) 1.11889(5) 0.02413(18) Uani 1 1 d . Cl3 Cl 0.62000(10) -0.15499(5) 0.94540(5) 0.02452(18) Uani 1 1 d . Cl4 Cl 0.69109(11) -0.12008(5) 0.77377(5) 0.02603(18) Uani 1 1 d . Cl5 Cl 0.18320(10) 0.23196(5) 0.66908(5) 0.02453(18) Uani 1 1 d . Cl6 Cl 0.36692(11) 0.06703(6) 0.71596(5) 0.02786(19) Uani 1 1 d . Cl7 Cl 0.41592(10) -0.12335(5) 0.57517(5) 0.02659(18) Uani 1 1 d . Cl8 Cl 0.28250(10) -0.14922(5) 0.38341(5) 0.02429(18) Uani 1 1 d . Cl9 Cl 0.84584(10) 0.59989(5) 1.13311(5) 0.02467(18) Uani 1 1 d . Cl10 Cl 0.67542(11) 0.39960(6) 1.10700(5) 0.02611(18) Uani 1 1 d . Cl11 Cl 0.53971(10) 0.27012(5) 0.92525(5) 0.02384(18) Uani 1 1 d . Cl12 Cl 0.59285(10) 0.33458(5) 0.76572(5) 0.02380(18) Uani 1 1 d . Cl13 Cl 0.87215(10) 0.33156(5) 0.33977(5) 0.02463(18) Uani 1 1 d . Cl14 Cl 0.70372(11) 0.51188(5) 0.31122(5) 0.02551(18) Uani 1 1 d . Cl15 Cl 0.58408(10) 0.67366(5) 0.46481(5) 0.02356(18) Uani 1 1 d . Cl16 Cl 0.63317(10) 0.65777(5) 0.65090(5) 0.02340(18) Uani 1 1 d . N1 N 0.8857(3) 0.08002(17) 0.81162(17) 0.0178(5) Uani 1 1 d . N2 N 0.9651(3) 0.19259(17) 0.93585(15) 0.0185(5) Uani 1 1 d . N3 N 0.0995(3) 0.03215(17) 0.36470(15) 0.0191(5) Uani 1 1 d . N4 N 0.0576(3) 0.16861(18) 0.46609(16) 0.0185(5) Uani 1 1 d . N5 N 0.7627(3) 0.53855(17) 0.82020(16) 0.0191(5) Uani 1 1 d . N6 N 0.8541(3) 0.63475(18) 0.95131(16) 0.0190(5) Uani 1 1 d . N7 N 0.8943(3) 0.34616(17) 0.53617(16) 0.0192(5) Uani 1 1 d . N8 N 0.8011(3) 0.46210(17) 0.64520(16) 0.0191(5) Uani 1 1 d . C1 C 0.9646(4) 0.1655(2) 0.85190(19) 0.0204(6) Uani 1 1 d . H1 H 1.0151 0.2028 0.8224 0.025 Uiso 1 1 calc R C2 C 0.8810(4) 0.1180(2) 0.95171(19) 0.0175(6) Uani 1 1 d . C3 C 0.8421(4) 0.1046(2) 1.02804(19) 0.0194(6) Uani 1 1 d . C4 C 0.7618(4) 0.0197(2) 1.02516(19) 0.0200(6) Uani 1 1 d . C5 C 0.7170(4) -0.0509(2) 0.9468(2) 0.0198(6) Uani 1 1 d . C6 C 0.7495(4) -0.0367(2) 0.87083(19) 0.0194(6) Uani 1 1 d . C7 C 0.8324(4) 0.0478(2) 0.87434(18) 0.0170(6) Uani 1 1 d . C8 C 0.0338(4) 0.1168(2) 0.38283(19) 0.0201(6) Uani 1 1 d . H8 H -0.0253 0.1393 0.3408 0.024 Uiso 1 1 calc R C9 C 0.1459(4) 0.1127(2) 0.50691(19) 0.0167(6) Uani 1 1 d . C10 C 0.2076(4) 0.1267(2) 0.59172(18) 0.0182(6) Uani 1 1 d . C11 C 0.2913(4) 0.0528(2) 0.61149(19) 0.0213(6) Uani 1 1 d . C12 C 0.3147(4) -0.0330(2) 0.5480(2) 0.0194(6) Uani 1 1 d . C13 C 0.2558(4) -0.04550(19) 0.46370(18) 0.0168(6) Uani 1 1 d . C14 C 0.1712(4) 0.0272(2) 0.44275(18) 0.0176(6) Uani 1 1 d . C15 C 0.8334(4) 0.6215(2) 0.86645(19) 0.0220(6) Uani 1 1 d . H15 H 0.8668 0.6677 0.8423 0.026 Uiso 1 1 calc R C16 C 0.7893(4) 0.5535(2) 0.96166(19) 0.0175(6) Uani 1 1 d . C17 C 0.7739(4) 0.5254(2) 1.03300(18) 0.0189(6) Uani 1 1 d . C18 C 0.6976(4) 0.4363(2) 1.02024(18) 0.0177(6) Uani 1 1 d . C19 C 0.6391(4) 0.3773(2) 0.93806(19) 0.0186(6) Uani 1 1 d . C20 C 0.6580(4) 0.40552(19) 0.86756(19) 0.0179(6) Uani 1 1 d . C21 C 0.7328(4) 0.4946(2) 0.87920(18) 0.0177(6) Uani 1 1 d . C22 C 0.8736(4) 0.3767(2) 0.61812(19) 0.0205(6) Uani 1 1 d . H22 H 0.9067 0.3418 0.6553 0.025 Uiso 1 1 calc R C23 C 0.8277(4) 0.41689(19) 0.50638(18) 0.0168(6) Uani 1 1 d . C24 C 0.8077(4) 0.42281(19) 0.42393(18) 0.0158(6) Uani 1 1 d . C25 C 0.7337(4) 0.5030(2) 0.41206(18) 0.0182(6) Uani 1 1 d . C26 C 0.6790(4) 0.5770(2) 0.48222(19) 0.0196(6) Uani 1 1 d . C27 C 0.6974(4) 0.5707(2) 0.56383(18) 0.0177(6) Uani 1 1 d . C28 C 0.7701(4) 0.48941(19) 0.57424(18) 0.0169(6) Uani 1 1 d . H2 H 0.887(4) 0.057(2) 0.766(2) 0.014(9) Uiso 1 1 d . H3 H 0.010(6) 0.223(3) 0.485(3) 0.048(12) Uiso 1 1 d . H4 H 0.902(5) 0.685(3) 0.991(2) 0.034(10) Uiso 1 1 d . H5 H 0.786(5) 0.489(3) 0.699(3) 0.042(12) Uiso 1 1 d . 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 0.0320(4) 0.0226(4) 0.0166(4) 0.0027(3) 0.0033(3) -0.0017(3) Cl2 0.0260(4) 0.0298(4) 0.0214(4) 0.0139(3) 0.0064(3) 0.0030(3) Cl3 0.0268(4) 0.0190(4) 0.0308(4) 0.0116(3) 0.0050(3) -0.0015(3) Cl4 0.0336(4) 0.0203(4) 0.0210(4) 0.0025(3) 0.0008(3) -0.0069(3) Cl5 0.0313(4) 0.0221(4) 0.0171(4) 0.0020(3) 0.0020(3) -0.0017(3) Cl6 0.0328(4) 0.0336(4) 0.0183(4) 0.0108(3) -0.0015(3) -0.0033(3) Cl7 0.0251(4) 0.0250(4) 0.0329(4) 0.0143(3) 0.0008(3) 0.0030(3) Cl8 0.0267(4) 0.0166(4) 0.0263(4) 0.0017(3) 0.0048(3) 0.0002(3) Cl9 0.0295(4) 0.0273(4) 0.0139(4) 0.0026(3) -0.0005(3) 0.0016(3) Cl10 0.0322(4) 0.0304(4) 0.0205(4) 0.0141(3) 0.0052(3) 0.0050(3) Cl11 0.0259(4) 0.0187(4) 0.0291(4) 0.0102(3) 0.0048(3) -0.0013(3) Cl12 0.0309(4) 0.0193(4) 0.0174(4) 0.0009(3) 0.0012(3) -0.0055(3) Cl13 0.0332(4) 0.0217(4) 0.0163(4) 0.0012(3) 0.0066(3) 0.0023(3) Cl14 0.0349(4) 0.0266(4) 0.0165(4) 0.0095(3) 0.0003(3) -0.0014(3) Cl15 0.0267(4) 0.0175(4) 0.0281(4) 0.0098(3) 0.0017(3) 0.0010(3) Cl16 0.0285(4) 0.0162(4) 0.0219(4) 0.0001(3) 0.0061(3) 0.0015(3) N1 0.0240(13) 0.0156(13) 0.0116(13) 0.0019(10) 0.0004(10) -0.0027(10) N2 0.0225(13) 0.0169(12) 0.0155(12) 0.0047(10) 0.0012(10) -0.0027(10) N3 0.0207(13) 0.0206(13) 0.0151(12) 0.0043(10) 0.0026(10) -0.0036(10) N4 0.0218(13) 0.0147(13) 0.0196(13) 0.0056(10) 0.0046(10) -0.0003(10) N5 0.0247(13) 0.0152(12) 0.0173(13) 0.0045(10) 0.0042(10) -0.0028(10) N6 0.0246(13) 0.0153(13) 0.0155(13) 0.0025(10) 0.0023(10) -0.0017(10) N7 0.0243(13) 0.0171(12) 0.0182(13) 0.0081(10) 0.0033(10) 0.0001(10) N8 0.0268(14) 0.0161(13) 0.0137(13) 0.0034(10) 0.0031(10) -0.0003(10) C1 0.0253(16) 0.0176(15) 0.0194(15) 0.0073(12) 0.0028(12) -0.0030(12) C2 0.0182(14) 0.0149(14) 0.0189(15) 0.0047(12) 0.0019(11) 0.0004(11) C3 0.0207(15) 0.0196(15) 0.0167(15) 0.0036(12) 0.0023(12) 0.0040(12) C4 0.0166(14) 0.0284(16) 0.0184(15) 0.0115(13) 0.0043(11) 0.0034(12) C5 0.0174(14) 0.0209(15) 0.0243(16) 0.0115(13) 0.0040(12) -0.0006(11) C6 0.0202(15) 0.0171(15) 0.0184(15) 0.0023(12) 0.0005(11) 0.0003(11) C7 0.0173(14) 0.0178(15) 0.0173(15) 0.0073(12) 0.0019(11) 0.0012(11) C8 0.0234(15) 0.0202(15) 0.0182(15) 0.0080(12) 0.0026(12) -0.0029(12) C9 0.0171(14) 0.0149(14) 0.0187(14) 0.0063(11) 0.0022(11) -0.0031(11) C10 0.0217(15) 0.0146(14) 0.0168(15) 0.0022(11) 0.0040(11) -0.0028(11) C11 0.0188(15) 0.0303(17) 0.0164(15) 0.0097(13) 0.0014(12) -0.0050(12) C12 0.0193(14) 0.0119(14) 0.0291(17) 0.0093(12) 0.0023(12) 0.0002(11) C13 0.0193(14) 0.0092(13) 0.0203(15) 0.0015(11) 0.0048(11) -0.0015(10) C14 0.0180(14) 0.0180(14) 0.0171(14) 0.0051(12) 0.0049(11) -0.0050(11) C15 0.0255(16) 0.0205(15) 0.0206(16) 0.0069(12) 0.0037(12) -0.0014(12) C16 0.0189(14) 0.0130(14) 0.0188(15) 0.0025(11) 0.0014(11) 0.0027(11) C17 0.0166(14) 0.0236(16) 0.0138(14) 0.0021(12) 0.0022(11) 0.0033(11) C18 0.0198(14) 0.0190(15) 0.0178(15) 0.0095(12) 0.0068(11) 0.0051(11) C19 0.0158(14) 0.0192(15) 0.0227(16) 0.0089(12) 0.0041(11) 0.0018(11) C20 0.0205(15) 0.0120(14) 0.0192(15) 0.0021(11) 0.0023(12) 0.0020(11) C21 0.0162(14) 0.0211(15) 0.0144(14) 0.0043(12) 0.0000(11) 0.0004(11) C22 0.0233(15) 0.0208(15) 0.0184(15) 0.0074(12) 0.0020(12) -0.0014(12) C23 0.0217(15) 0.0106(13) 0.0182(14) 0.0041(11) 0.0047(11) -0.0019(11) C24 0.0180(14) 0.0121(13) 0.0153(14) 0.0013(11) 0.0024(11) -0.0020(10) C25 0.0183(14) 0.0222(15) 0.0145(14) 0.0069(12) -0.0006(11) -0.0040(11) C26 0.0212(15) 0.0155(14) 0.0217(16) 0.0054(12) 0.0019(12) -0.0005(11) C27 0.0163(14) 0.0177(14) 0.0171(14) 0.0024(11) 0.0025(11) -0.0014(11) C28 0.0179(14) 0.0153(14) 0.0164(14) 0.0034(11) 0.0019(11) -0.0036(11) 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' 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 C1 N1 C7 106.1(3) C1 N2 C2 104.0(2) C8 N3 C14 104.3(2) C8 N4 C9 106.0(2) C15 N5 C21 104.2(2) C15 N6 C16 106.0(3) C22 N7 C23 104.1(2) C22 N8 C28 105.9(2) N2 C1 N1 114.1(3) N2 C2 C7 109.3(2) N2 C2 C3 131.3(3) C7 C2 C3 119.4(3) C4 C3 C2 119.0(3) C4 C3 Cl1 120.3(2) C2 C3 Cl1 120.7(2) C3 C4 C5 120.9(3) C3 C4 Cl2 119.4(2) C5 C4 Cl2 119.7(2) C6 C5 C4 120.4(3) C6 C5 Cl3 119.9(2) C4 C5 Cl3 119.8(2) C5 C6 C7 118.4(3) C5 C6 Cl4 121.7(2) C7 C6 Cl4 119.9(2) N1 C7 C6 131.6(3) N1 C7 C2 106.4(2) C6 C7 C2 122.0(3) N3 C8 N4 114.5(3) N4 C9 C10 133.2(3) N4 C9 C14 105.8(3) C10 C9 C14 121.0(3) C11 C10 C9 118.0(3) C11 C10 Cl5 121.0(2) C9 C10 Cl5 120.9(2) C10 C11 C12 121.2(3) C10 C11 Cl6 119.3(2) C12 C11 Cl6 119.5(2) C13 C12 C11 120.3(3) C13 C12 Cl7 119.9(2) C11 C12 Cl7 119.9(2) C12 C13 C14 119.4(3) C12 C13 Cl8 122.0(2) C14 C13 Cl8 118.6(2) N3 C14 C13 130.6(3) N3 C14 C9 109.3(3) C13 C14 C9 120.1(3) N5 C15 N6 114.2(3) N6 C16 C17 133.0(3) N6 C16 C21 105.5(3) C17 C16 C21 121.5(3) C16 C17 C18 117.9(3) C16 C17 Cl9 120.0(2) C18 C17 Cl9 122.1(2) C17 C18 C19 120.9(3) C17 C18 Cl10 119.1(2) C19 C18 Cl10 119.9(2) C20 C19 C18 120.5(3) C20 C19 Cl11 119.9(2) C18 C19 Cl11 119.6(2) C19 C20 C21 119.3(3) C19 C20 Cl12 122.1(2) C21 C20 Cl12 118.6(2) N5 C21 C20 130.1(3) N5 C21 C16 110.1(3) C20 C21 C16 119.8(3) N7 C22 N8 114.4(3) N7 C23 C24 130.7(3) N7 C23 C28 109.4(3) C24 C23 C28 119.8(3) C25 C24 C23 118.5(3) C25 C24 Cl13 121.7(2) C23 C24 Cl13 119.8(2) C24 C25 C26 120.8(3) C24 C25 Cl14 119.8(2) C26 C25 Cl14 119.4(2) C27 C26 C25 120.6(3) C27 C26 Cl15 119.9(2) C25 C26 Cl15 119.5(2) C26 C27 C28 117.7(3) C26 C27 Cl16 122.6(2) C28 C27 Cl16 119.7(2) N8 C28 C27 131.3(3) N8 C28 C23 106.2(2) C27 C28 C23 122.5(3) loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance Cl1 C3 1.717(3) Cl2 C4 1.723(3) Cl3 C5 1.717(3) Cl4 C6 1.719(3) Cl5 C10 1.715(3) Cl6 C11 1.726(3) Cl7 C12 1.725(3) Cl8 C13 1.725(3) Cl9 C17 1.724(3) Cl10 C18 1.720(3) Cl11 C19 1.717(3) Cl12 C20 1.717(3) Cl13 C24 1.723(3) Cl14 C25 1.719(3) Cl15 C26 1.719(3) Cl16 C27 1.719(3) N1 C1 1.354(4) N1 C7 1.368(4) N2 C1 1.322(4) N2 C2 1.393(4) N3 C8 1.320(4) N3 C14 1.387(4) N4 C8 1.350(4) N4 C9 1.379(4) N5 C15 1.321(4) N5 C21 1.378(4) N6 C15 1.355(4) N6 C16 1.380(4) N7 C22 1.313(4) N7 C23 1.389(4) N8 C22 1.352(4) N8 C28 1.370(4) C2 C7 1.398(4) C2 C3 1.399(4) C3 C4 1.395(4) C4 C5 1.407(4) C5 C6 1.386(4) C6 C7 1.396(4) C9 C10 1.395(4) C9 C14 1.411(4) C10 C11 1.395(4) C11 C12 1.406(4) C12 C13 1.386(4) C13 C14 1.392(4) C16 C17 1.393(4) C16 C21 1.403(4) C17 C18 1.402(4) C18 C19 1.403(4) C19 C20 1.385(4) C20 C21 1.401(4) C23 C24 1.397(4) C23 C28 1.396(4) C24 C25 1.394(4) C25 C26 1.422(4) C26 C27 1.385(4) C27 C28 1.396(4) _journal_paper_doi 10.1039/c2dt00055e