#------------------------------------------------------------------------------ #$Date: 2013-12-29 13:49:26 +0200 (Sun, 29 Dec 2013) $ #$Revision: 91935 $ #$URL: file:///home/coder/svn-repositories/cod/cif/4/50/02/4500220.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_4500220 loop_ _publ_author_name 'Das, Babulal' 'Baruah, Jubaraj B.' _publ_section_title ; Water Bridged Assembly and Dimer Formation in Co-Crystals of Caffeine or Theophylline with Polycarboxylic Acids ; _journal_issue 1 _journal_name_full 'Crystal Growth & Design' _journal_page_first 278 _journal_volume 11 _journal_year 2011 _chemical_formula_sum 'C21 H22 N6 O12' _chemical_formula_weight 550.45 _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 90.126(3) _cell_angle_beta 94.010(3) _cell_angle_gamma 98.789(3) _cell_formula_units_Z 2 _cell_length_a 7.0692(4) _cell_length_b 8.0877(4) _cell_length_c 20.8190(10) _cell_measurement_temperature 296(2) _cell_volume 1173.34(11) _computing_cell_refinement 'Bruker SMART' _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 296(2) _diffrn_measured_fraction_theta_full 0.975 _diffrn_measured_fraction_theta_max 0.975 _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 0.0273 _diffrn_reflns_av_sigmaI/netI 0.0219 _diffrn_reflns_limit_h_max 8 _diffrn_reflns_limit_h_min -8 _diffrn_reflns_limit_k_max 9 _diffrn_reflns_limit_k_min -9 _diffrn_reflns_limit_l_max 24 _diffrn_reflns_limit_l_min -23 _diffrn_reflns_number 14951 _diffrn_reflns_theta_full 24.50 _diffrn_reflns_theta_max 24.50 _diffrn_reflns_theta_min 0.98 _exptl_absorpt_coefficient_mu 0.130 _exptl_absorpt_correction_type none _exptl_crystal_colour colorless _exptl_crystal_density_diffrn 1.558 _exptl_crystal_density_method 'not measured' _exptl_crystal_description plates _exptl_crystal_F_000 572 _exptl_crystal_size_max 0.26 _exptl_crystal_size_mid 0.18 _exptl_crystal_size_min 0.08 _refine_diff_density_max 0.256 _refine_diff_density_min -0.530 _refine_diff_density_rms 0.051 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.172 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 379 _refine_ls_number_reflns 3825 _refine_ls_number_restraints 2 _refine_ls_restrained_S_all 1.195 _refine_ls_R_factor_all 0.0564 _refine_ls_R_factor_gt 0.0490 _refine_ls_shift/su_max 0.005 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0362P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.1565 _refine_ls_wR_factor_ref 0.1635 _reflns_number_gt 3234 _reflns_number_total 3825 _reflns_threshold_expression >2sigma(I) _[local]_cod_data_source_file cg1012846_si_002.cif _[local]_cod_data_source_block dpa-theo_0m _[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 1173.34(10) _cod_database_code 4500220 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 C1 C 1.1009(4) 0.4910(4) 0.19326(13) 0.0587(7) Uani 1 1 d . H1A H 1.1021 0.4273 0.1544 0.088 Uiso 1 1 calc R H1B H 1.2279 0.5481 0.2050 0.088 Uiso 1 1 calc R H1C H 1.0149 0.5713 0.1865 0.088 Uiso 1 1 calc R C2 C 1.0119(3) 0.4559(3) 0.30402(11) 0.0414(6) Uani 1 1 d . C3 C 0.9363(5) 0.4241(3) 0.41766(12) 0.0587(7) Uani 1 1 d . H3A H 0.8031 0.4258 0.4236 0.088 Uiso 1 1 calc R H3B H 1.0046 0.5363 0.4201 0.088 Uiso 1 1 calc R H3C H 0.9888 0.3581 0.4507 0.088 Uiso 1 1 calc R C4 C 0.9185(3) 0.1821(3) 0.34351(10) 0.0368(5) Uani 1 1 d . C5 C 0.8358(4) -0.0793(3) 0.35324(13) 0.0510(6) Uani 1 1 d . H5 H 0.7939 -0.1833 0.3705 0.061 Uiso 1 1 calc R C6 C 0.9326(3) 0.1117(3) 0.28474(11) 0.0384(5) Uani 1 1 d . C7 C 0.9959(3) 0.2073(3) 0.23140(11) 0.0405(6) Uani 1 1 d . C8 C 0.2904(3) 0.0841(3) 0.47132(11) 0.0440(6) Uani 1 1 d . C9 C 0.3464(3) 0.0841(3) 0.40312(11) 0.0406(5) Uani 1 1 d . C10 C 0.3340(4) -0.0615(3) 0.36748(11) 0.0462(6) Uani 1 1 d . H10 H 0.2945 -0.1647 0.3858 0.055 Uiso 1 1 calc R C11 C 0.3808(4) -0.0523(3) 0.30435(12) 0.0546(7) Uani 1 1 d . H11 H 0.3711 -0.1487 0.2792 0.066 Uiso 1 1 calc R C12 C 0.4424(4) 0.1032(3) 0.27905(12) 0.0496(6) Uani 1 1 d . H12 H 0.4754 0.1138 0.2366 0.060 Uiso 1 1 calc R C13 C 0.4536(3) 0.2429(3) 0.31885(11) 0.0421(6) Uani 1 1 d . C14 C 0.5214(4) 0.4164(4) 0.29418(14) 0.0531(7) Uani 1 1 d . C15 C 0.2735(3) 0.8982(3) 0.09706(11) 0.0417(6) Uani 1 1 d . C16 C 0.3519(3) 0.8327(3) 0.03857(10) 0.0359(5) Uani 1 1 d . C17 C 0.2666(3) 0.8413(3) -0.02317(11) 0.0419(5) Uani 1 1 d . H17 H 0.1556 0.8891 -0.0303 0.050 Uiso 1 1 calc R C18 C 0.3505(4) 0.7771(3) -0.07374(11) 0.0452(6) Uani 1 1 d . H18 H 0.2954 0.7795 -0.1156 0.054 Uiso 1 1 calc R C19 C 0.5168(3) 0.7093(3) -0.06164(11) 0.0418(5) Uani 1 1 d . H19 H 0.5766 0.6663 -0.0949 0.050 Uiso 1 1 calc R C20 C 0.5927(3) 0.7071(3) 0.00179(10) 0.0355(5) Uani 1 1 d . C21 C 0.7735(3) 0.6371(3) 0.01958(12) 0.0410(6) Uani 1 1 d D H11A H 0.569(4) 0.763(6) 0.184(2) 0.132(16) Uiso 1 1 d D H11B H 0.777(8) 0.747(9) 0.154(3) 0.24(3) Uiso 1 1 d D H4N H 0.865(4) -0.140(4) 0.2594(15) 0.067(9) Uiso 1 1 d . H8O H 0.115(5) 1.026(4) 0.1233(10) 0.101(12) Uiso 1 1 d D N1 N 1.0362(3) 0.3773(2) 0.24550(9) 0.0406(5) Uani 1 1 d . N2 N 0.9552(3) 0.3506(2) 0.35417(9) 0.0403(5) Uani 1 1 d . N3 N 0.8580(3) 0.0632(2) 0.38699(9) 0.0433(5) Uani 1 1 d . N4 N 0.8795(3) -0.0581(3) 0.29212(10) 0.0483(5) Uani 1 1 d . N5 N 0.4056(3) 0.2359(2) 0.37951(9) 0.0428(5) Uani 1 1 d . N6 N 0.5127(3) 0.7670(2) 0.05116(8) 0.0364(4) Uani 1 1 d . O1 O 1.0367(3) 0.6067(2) 0.30982(9) 0.0589(5) Uani 1 1 d . O2 O 1.0137(3) 0.1528(2) 0.17691(8) 0.0595(5) Uani 1 1 d . O3 O 0.2916(3) 0.2086(2) 0.50299(9) 0.0666(6) Uani 1 1 d . O4 O 0.2393(3) -0.0685(2) 0.49203(8) 0.0607(5) Uani 1 1 d . H4O H 0.2068 -0.0642 0.5290 0.091 Uiso 1 1 calc R O5 O 0.5233(3) 0.5417(2) 0.32815(10) 0.0727(6) Uani 1 1 d . O6 O 0.5751(3) 0.4215(2) 0.23682(9) 0.0612(5) Uani 1 1 d D O7 O 0.3392(3) 0.8785(2) 0.15092(8) 0.0602(5) Uani 1 1 d . O8 O 0.1300(3) 0.9814(2) 0.08315(8) 0.0541(5) Uani 1 1 d D O9 O 0.8421(2) 0.6432(2) 0.07685(8) 0.0543(5) Uani 1 1 d . O10 O 0.8501(2) 0.5703(2) -0.02502(8) 0.0507(5) Uani 1 1 d D O11 O 0.6840(3) 0.7273(2) 0.18534(8) 0.0537(5) Uani 1 1 d D O12 O 0.4092(7) 0.5435(4) 0.4455(2) 0.1598(15) Uani 1 1 d . H6O H 0.600(7) 0.537(3) 0.225(2) 0.153(19) Uiso 1 1 d D H10O H 0.906(14) 0.494(13) 0.009(4) 0.35(5) Uiso 1 1 d 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 C1 0.0658(17) 0.0647(17) 0.0486(15) 0.0240(13) 0.0158(12) 0.0140(14) C2 0.0418(13) 0.0423(14) 0.0407(13) 0.0042(10) 0.0052(10) 0.0076(10) C3 0.086(2) 0.0501(15) 0.0403(15) -0.0103(12) 0.0109(13) 0.0099(14) C4 0.0344(11) 0.0378(12) 0.0391(13) 0.0013(10) 0.0051(9) 0.0073(9) C5 0.0549(15) 0.0401(13) 0.0587(16) 0.0045(12) 0.0121(12) 0.0057(11) C6 0.0418(12) 0.0382(12) 0.0367(12) -0.0032(9) 0.0068(9) 0.0088(9) C7 0.0372(12) 0.0505(14) 0.0375(13) 0.0000(10) 0.0050(9) 0.0172(10) C8 0.0454(13) 0.0425(14) 0.0430(13) 0.0013(11) 0.0073(10) 0.0013(10) C9 0.0344(12) 0.0436(13) 0.0434(13) 0.0070(10) 0.0048(9) 0.0040(9) C10 0.0521(14) 0.0416(13) 0.0429(14) 0.0032(10) 0.0065(11) 0.0000(11) C11 0.0627(16) 0.0536(15) 0.0469(15) -0.0021(12) 0.0108(12) 0.0035(12) C12 0.0488(14) 0.0587(16) 0.0401(13) 0.0072(12) 0.0065(11) 0.0026(12) C13 0.0337(12) 0.0492(14) 0.0436(13) 0.0112(11) 0.0055(9) 0.0054(10) C14 0.0418(14) 0.0564(17) 0.0600(17) 0.0198(13) 0.0052(12) 0.0031(11) C15 0.0431(13) 0.0400(12) 0.0435(14) 0.0023(10) 0.0088(10) 0.0083(10) C16 0.0377(12) 0.0314(11) 0.0389(12) 0.0009(9) 0.0062(9) 0.0045(9) C17 0.0361(12) 0.0433(13) 0.0473(13) 0.0030(10) 0.0036(10) 0.0094(10) C18 0.0508(14) 0.0502(14) 0.0346(12) -0.0006(10) -0.0016(10) 0.0098(11) C19 0.0478(13) 0.0401(13) 0.0383(12) -0.0024(10) 0.0081(10) 0.0069(10) C20 0.0386(12) 0.0310(11) 0.0368(12) 0.0021(9) 0.0064(9) 0.0035(9) C21 0.0393(12) 0.0350(12) 0.0495(14) 0.0055(10) 0.0095(11) 0.0056(10) N1 0.0429(11) 0.0428(11) 0.0382(10) 0.0073(8) 0.0084(8) 0.0103(8) N2 0.0524(12) 0.0360(10) 0.0334(10) -0.0037(8) 0.0061(8) 0.0078(8) N3 0.0496(11) 0.0407(11) 0.0406(11) 0.0058(9) 0.0089(8) 0.0071(9) N4 0.0581(13) 0.0367(11) 0.0508(13) -0.0077(10) 0.0078(10) 0.0082(9) N5 0.0394(11) 0.0420(11) 0.0471(12) 0.0087(9) 0.0068(8) 0.0044(8) N6 0.0375(10) 0.0351(10) 0.0375(10) 0.0014(8) 0.0070(8) 0.0064(8) O1 0.0789(13) 0.0351(10) 0.0625(11) 0.0015(8) 0.0114(9) 0.0050(8) O2 0.0739(13) 0.0742(13) 0.0369(10) -0.0055(9) 0.0115(8) 0.0284(10) O3 0.0918(15) 0.0494(11) 0.0573(12) -0.0041(9) 0.0247(10) -0.0017(10) O4 0.0891(15) 0.0474(10) 0.0456(11) 0.0088(8) 0.0226(10) 0.0024(9) O5 0.0942(16) 0.0451(11) 0.0800(14) 0.0077(10) 0.0278(12) 0.0044(10) O6 0.0688(13) 0.0573(12) 0.0573(12) 0.0172(9) 0.0174(9) 0.0030(10) O7 0.0726(13) 0.0757(13) 0.0393(10) 0.0003(9) 0.0085(9) 0.0318(10) O8 0.0522(10) 0.0651(12) 0.0510(11) -0.0062(9) 0.0094(8) 0.0261(9) O9 0.0507(10) 0.0707(12) 0.0447(10) 0.0010(8) -0.0025(8) 0.0225(9) O10 0.0484(10) 0.0609(11) 0.0484(10) 0.0007(8) 0.0109(8) 0.0227(8) O11 0.0649(12) 0.0547(11) 0.0429(10) 0.0035(8) 0.0057(9) 0.0128(9) O12 0.194(4) 0.112(3) 0.159(3) -0.010(2) 0.027(3) -0.029(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' 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' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle N1 C1 H1A 109.5 N1 C1 H1B 109.5 H1A C1 H1B 109.5 N1 C1 H1C 109.5 H1A C1 H1C 109.5 H1B C1 H1C 109.5 O1 C2 N2 122.2(2) O1 C2 N1 121.6(2) N2 C2 N1 116.2(2) N2 C3 H3A 109.5 N2 C3 H3B 109.5 H3A C3 H3B 109.5 N2 C3 H3C 109.5 H3A C3 H3C 109.5 H3B C3 H3C 109.5 N2 C4 N3 126.5(2) N2 C4 C6 122.4(2) N3 C4 C6 111.1(2) N3 C5 N4 113.4(2) N3 C5 H5 123.3 N4 C5 H5 123.3 C4 C6 N4 105.7(2) C4 C6 C7 122.5(2) N4 C6 C7 131.8(2) O2 C7 N1 121.1(2) O2 C7 C6 126.3(2) N1 C7 C6 112.6(2) O3 C8 O4 124.2(2) O3 C8 C9 124.0(2) O4 C8 C9 111.8(2) N5 C9 C10 123.0(2) N5 C9 C8 114.9(2) C10 C9 C8 122.1(2) C11 C10 C9 119.1(2) C11 C10 H10 120.4 C9 C10 H10 120.4 C10 C11 C12 118.8(2) C10 C11 H11 120.6 C12 C11 H11 120.6 C11 C12 C13 118.1(2) C11 C12 H12 121.0 C13 C12 H12 121.0 N5 C13 C12 123.7(2) N5 C13 C14 115.7(2) C12 C13 C14 120.6(2) O5 C14 O6 123.6(2) O5 C14 C13 121.1(2) O6 C14 C13 115.3(3) O7 C15 O8 124.1(2) O7 C15 C16 122.7(2) O8 C15 C16 113.2(2) N6 C16 C17 122.9(2) N6 C16 C15 113.96(19) C17 C16 C15 123.1(2) C18 C17 C16 118.5(2) C18 C17 H17 120.8 C16 C17 H17 120.8 C19 C18 C17 119.4(2) C19 C18 H18 120.3 C17 C18 H18 120.3 C18 C19 C20 118.1(2) C18 C19 H19 120.9 C20 C19 H19 120.9 N6 C20 C19 123.3(2) N6 C20 C21 114.77(19) C19 C20 C21 122.0(2) O9 C21 O10 122.2(2) O9 C21 C20 120.3(2) O10 C21 C20 117.4(2) C7 N1 C2 126.74(19) C7 N1 C1 117.7(2) C2 N1 C1 115.4(2) C4 N2 C2 119.45(19) C4 N2 C3 121.5(2) C2 N2 C3 119.1(2) C5 N3 C4 103.71(19) C5 N4 C6 106.2(2) C5 N4 H4N 127.5(19) C6 N4 H4N 126.1(18) C13 N5 C9 117.3(2) C20 N6 C16 117.85(19) C8 O4 H4O 109.5 C14 O6 H6O 108(3) C15 O8 H8O 101(2) C21 O10 H10O 89(6) H11A O11 H11B 127(5) loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance C1 N1 1.478(3) C1 H1A 0.9600 C1 H1B 0.9600 C1 H1C 0.9600 C2 O1 1.210(3) C2 N2 1.391(3) C2 N1 1.406(3) C3 N2 1.471(3) C3 H3A 0.9600 C3 H3B 0.9600 C3 H3C 0.9600 C4 N2 1.362(3) C4 N3 1.363(3) C4 C6 1.365(3) C5 N3 1.331(3) C5 N4 1.336(3) C5 H5 0.9300 C6 N4 1.379(3) C6 C7 1.414(3) C7 O2 1.238(3) C7 N1 1.387(3) C8 O3 1.201(3) C8 O4 1.314(3) C8 C9 1.500(3) C9 N5 1.341(3) C9 C10 1.379(3) C10 C11 1.377(4) C10 H10 0.9300 C11 C12 1.384(4) C11 H11 0.9300 C12 C13 1.389(4) C12 H12 0.9300 C13 N5 1.329(3) C13 C14 1.515(3) C14 O5 1.232(3) C14 O6 1.277(3) C15 O7 1.204(3) C15 O8 1.317(3) C15 C16 1.501(3) C16 N6 1.337(3) C16 C17 1.387(3) C17 C18 1.382(3) C17 H17 0.9300 C18 C19 1.379(3) C18 H18 0.9300 C19 C20 1.391(3) C19 H19 0.9300 C20 N6 1.332(3) C20 C21 1.499(3) C21 O9 1.253(3) C21 O10 1.267(3) N4 H4N 0.94(3) O4 H4O 0.8200 O6 H6O 0.96(2) O8 H8O 0.928(15) O10 H10O 1.00(9) O11 H11A 0.90(2) O11 H11B 0.95(2) loop_ _geom_torsion_atom_site_label_1 _geom_torsion_atom_site_label_2 _geom_torsion_atom_site_label_3 _geom_torsion_atom_site_label_4 _geom_torsion N2 C4 C6 N4 -178.1(2) N3 C4 C6 N4 -0.3(3) N2 C4 C6 C7 3.4(4) N3 C4 C6 C7 -178.8(2) C4 C6 C7 O2 179.5(2) N4 C6 C7 O2 1.5(4) C4 C6 C7 N1 -1.5(3) N4 C6 C7 N1 -179.5(2) O3 C8 C9 N5 2.1(4) O4 C8 C9 N5 -178.2(2) O3 C8 C9 C10 -176.8(2) O4 C8 C9 C10 3.0(3) N5 C9 C10 C11 -1.2(4) C8 C9 C10 C11 177.6(2) C9 C10 C11 C12 1.2(4) C10 C11 C12 C13 -0.1(4) C11 C12 C13 N5 -1.1(4) C11 C12 C13 C14 179.5(2) N5 C13 C14 O5 -2.9(3) C12 C13 C14 O5 176.6(2) N5 C13 C14 O6 177.1(2) C12 C13 C14 O6 -3.5(3) O7 C15 C16 N6 -6.8(3) O8 C15 C16 N6 171.81(18) O7 C15 C16 C17 173.9(2) O8 C15 C16 C17 -7.5(3) N6 C16 C17 C18 0.8(3) C15 C16 C17 C18 -180.0(2) C16 C17 C18 C19 -1.0(3) C17 C18 C19 C20 0.6(3) C18 C19 C20 N6 0.0(3) C18 C19 C20 C21 -179.6(2) N6 C20 C21 O9 -2.5(3) C19 C20 C21 O9 177.1(2) N6 C20 C21 O10 176.30(18) C19 C20 C21 O10 -4.0(3) O2 C7 N1 C2 176.2(2) C6 C7 N1 C2 -2.9(3) O2 C7 N1 C1 0.0(3) C6 C7 N1 C1 -179.1(2) O1 C2 N1 C7 -173.9(2) N2 C2 N1 C7 5.1(3) O1 C2 N1 C1 2.4(3) N2 C2 N1 C1 -178.6(2) N3 C4 N2 C2 -178.4(2) C6 C4 N2 C2 -1.0(3) N3 C4 N2 C3 1.6(4) C6 C4 N2 C3 179.0(2) O1 C2 N2 C4 176.1(2) N1 C2 N2 C4 -3.0(3) O1 C2 N2 C3 -3.9(4) N1 C2 N2 C3 177.0(2) N4 C5 N3 C4 0.5(3) N2 C4 N3 C5 177.6(2) C6 C4 N3 C5 -0.1(3) N3 C5 N4 C6 -0.7(3) C4 C6 N4 C5 0.6(3) C7 C6 N4 C5 178.9(2) C12 C13 N5 C9 1.1(3) C14 C13 N5 C9 -179.5(2) C10 C9 N5 C13 0.0(3) C8 C9 N5 C13 -178.80(19) C19 C20 N6 C16 -0.3(3) C21 C20 N6 C16 179.40(17) C17 C16 N6 C20 -0.2(3) C15 C16 N6 C20 -179.46(18) _journal_paper_doi 10.1021/cg1012846