#------------------------------------------------------------------------------ #$Date: 2016-02-20 00:18:51 +0200 (Sat, 20 Feb 2016) $ #$Revision: 176760 $ #$URL: file:///home/coder/svn-repositories/cod/cif/2/01/45/2014597.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/. The original data for this entry # were provided by IUCr Journals, http://journals.iucr.org/. # # The file may be used within the scientific community so long as # proper attribution is given to the journal article from which the # data were obtained. # data_2014597 loop_ _publ_author_name 'Yun-Ling, Gao' 'Xiao-Jun, Peng' 'Shi-Guo, Sun' 'Chang-Neng, Chen ' 'Li-Cheng, Sun' _publ_section_title ;\m-Oxo-bis{[(6-hydroxymethyl-2-pyridylmethyl)bis(2-pyridylmethyl)amine-\k^5^N,N',N'',N''',O]iron(III)} tetrakis(perchlorate) ; _journal_issue 1 _journal_name_full 'Acta Crystallographica Section C' _journal_page_first m13 _journal_page_last m15 _journal_paper_doi 10.1107/S0108270104028148 _journal_volume 61 _journal_year 2005 _chemical_formula_iupac '[Fe2 O (C19 H20 N4 O)2] (Cl O4)4' _chemical_formula_moiety 'C38 H40 Fe2 N8 O3 4+, 4Cl O4 -' _chemical_formula_sum 'C38 H40 Cl4 Fe2 N8 O19' _chemical_formula_weight 1166.28 _chemical_name_systematic ; \m-Oxo-bis{[(6-hydroxymethyl-2-pyridylmethyl)bis(2-pyridylmethyl)amine -\k^5^N,N',N'',N''',O]iron(III)} tetrakis(perchlorate) ; _space_group_IT_number 15 _symmetry_cell_setting monoclinic _symmetry_space_group_name_Hall '-C 2yc' _symmetry_space_group_name_H-M 'C 1 2/c 1' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _cell_angle_alpha 90.00 _cell_angle_beta 111.220(2) _cell_angle_gamma 90.00 _cell_formula_units_Z 4 _cell_length_a 24.0733(9) _cell_length_b 9.9223(3) _cell_length_c 20.5055(8) _cell_measurement_reflns_used 3348 _cell_measurement_temperature 293(2) _cell_measurement_theta_max 25.10 _cell_measurement_theta_min 1.81 _cell_volume 4565.9(3) _computing_cell_refinement 'SMART and SAINT (Siemens,1994)' _computing_data_collection 'SMART (Siemens,1996)' _computing_data_reduction 'SAINT? and XPREP in SHELXTL (Siemens, 1994)' _computing_molecular_graphics SHELXTL _computing_publication_material SHELXTL _computing_structure_refinement SHELXTL _computing_structure_solution SHELXTL _diffrn_ambient_temperature 293(2) _diffrn_measured_fraction_theta_full 0.984 _diffrn_measured_fraction_theta_max 0.984 _diffrn_measurement_device_type 'Siemens SMART CCD area-detector' _diffrn_measurement_method '\f and \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 0.0450 _diffrn_reflns_av_sigmaI/netI 0.0549 _diffrn_reflns_limit_h_max 25 _diffrn_reflns_limit_h_min -28 _diffrn_reflns_limit_k_max 11 _diffrn_reflns_limit_k_min -11 _diffrn_reflns_limit_l_max 24 _diffrn_reflns_limit_l_min -12 _diffrn_reflns_number 7191 _diffrn_reflns_theta_full 25.10 _diffrn_reflns_theta_max 25.10 _diffrn_reflns_theta_min 1.81 _exptl_absorpt_coefficient_mu 0.957 _exptl_absorpt_correction_T_max .856 _exptl_absorpt_correction_T_min .7128 _exptl_absorpt_correction_type empirical _exptl_absorpt_process_details '(SADABS; Sheldrick, 1996)' _exptl_crystal_colour red _exptl_crystal_density_diffrn 1.697 _exptl_crystal_density_method 'not measured' _exptl_crystal_description block _exptl_crystal_F_000 2384 _exptl_crystal_size_max .34 _exptl_crystal_size_mid .28 _exptl_crystal_size_min .16 _refine_diff_density_max 0.655 _refine_diff_density_min -0.475 _refine_ls_goodness_of_fit_ref 1.090 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 326 _refine_ls_number_reflns 4002 _refine_ls_number_restraints 1 _refine_ls_restrained_S_all 1.090 _refine_ls_R_factor_gt 0.0752 _refine_ls_shift/su_max 0.000 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0536P)^2^+58.9568P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.1659 _refine_ls_wR_factor_ref 0.1910 _reflns_number_gt 3000 _reflns_number_total 4002 _reflns_threshold_expression I>2\s(I) _cod_data_source_file av1198.cif _cod_data_source_block I _cod_original_sg_symbol_H-M 'C 2/c' _cod_database_code 2014597 _cod_database_fobs_code 2014597 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, y, -z+1/2' 'x+1/2, y+1/2, z' '-x+1/2, y+1/2, -z+1/2' '-x, -y, -z' 'x, -y, z-1/2' '-x+1/2, -y+1/2, -z' 'x+1/2, -y+1/2, z-1/2' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_adp_type _atom_site_calc_flag _atom_site_refinement_flags _atom_site_occupancy _atom_site_disorder_assembly _atom_site_disorder_group _atom_site_type_symbol Fe1 0.29296(4) 0.79664(9) 0.08823(5) 0.0304(3) Uani d . 1 . . Fe O1 0.3169(2) 0.6180(5) 0.1415(3) 0.0451(12) Uani d D 1 . . O O2 0.2500 0.7500 0.0000 0.0445(17) Uani d S 1 . . O O3 0.4608(4) 0.3527(12) 0.0495(4) 0.144(4) Uani d . 1 . . O O4 0.4874(4) 0.4481(9) 0.1561(5) 0.119(3) Uani d . 1 . . O O5 0.4691(4) 0.2171(8) 0.1403(5) 0.130(3) Uani d . 1 . . O O6 0.3914(3) 0.3699(7) 0.1005(5) 0.102(3) Uani d . 1 . . O O7 0.1601(3) 0.3947(9) 0.1270(4) 0.108(3) Uani d . 1 . . O O8 0.2578(3) 0.3888(5) 0.1329(3) 0.0619(15) Uani d . 1 . . O O9 0.2360(3) 0.4851(6) 0.2249(3) 0.0765(19) Uani d . 1 . . O O10 0.2281(3) 0.2526(6) 0.2063(3) 0.0686(17) Uani d . 1 . . O N1 0.2182(2) 0.8654(6) 0.1099(3) 0.0360(13) Uani d . 1 . . N N2 0.2995(2) 1.0166(5) 0.0817(3) 0.0330(12) Uani d . 1 . . N N3 0.3697(2) 0.8181(6) 0.0602(3) 0.0377(13) Uani d . 1 . . N N4 0.3547(2) 0.8471(6) 0.1896(3) 0.0366(13) Uani d . 1 . . N C1 0.1858(3) 0.7920(8) 0.1383(4) 0.0444(17) Uani d . 1 . . C H1 0.1989 0.7062 0.1551 0.053 Uiso calc R 1 . . H C2 0.1338(3) 0.8394(9) 0.1435(4) 0.057(2) Uani d . 1 . . C H2 0.1122 0.7870 0.1636 0.068 Uiso calc R 1 . . H C3 0.1144(3) 0.9659(10) 0.1180(4) 0.062(2) Uani d . 1 . . C H3 0.0789 0.9989 0.1199 0.074 Uiso calc R 1 . . H C4 0.1473(3) 1.0440(8) 0.0899(4) 0.051(2) Uani d . 1 . . C H4 0.1350 1.1307 0.0739 0.062 Uiso calc R 1 . . H C5 0.1996(3) 0.9903(7) 0.0859(3) 0.0402(16) Uani d . 1 . . C C6 0.2364(3) 1.0635(7) 0.0511(4) 0.0420(16) Uani d . 1 . . C H6A 0.2206 1.0458 0.0012 0.050 Uiso calc R 1 . . H H6B 0.2346 1.1598 0.0581 0.050 Uiso calc R 1 . . H C7 0.3320(3) 1.0455(7) 0.0336(4) 0.0440(17) Uani d . 1 . . C H7A 0.3528 1.1308 0.0467 0.053 Uiso calc R 1 . . H H7B 0.3034 1.0544 -0.0137 0.053 Uiso calc R 1 . . H C8 0.3762(3) 0.9382(7) 0.0349(3) 0.0394(16) Uani d . 1 . . C C9 0.4190(3) 0.9582(8) 0.0047(4) 0.0502(19) Uani d . 1 . . C H9 0.4233 1.0419 -0.0133 0.060 Uiso calc R 1 . . H C10 0.4547(3) 0.8514(9) 0.0020(5) 0.060(2) Uani d . 1 . . C H10 0.4831 0.8620 -0.0186 0.072 Uiso calc R 1 . . H C11 0.4482(3) 0.7299(8) 0.0297(4) 0.0490(19) Uani d . 1 . . C H11 0.4727 0.6579 0.0289 0.059 Uiso calc R 1 . . H C12 0.4057(3) 0.7147(7) 0.0586(4) 0.0428(16) Uani d . 1 . . C H12 0.4014 0.6319 0.0775 0.051 Uiso calc R 1 . . H C13 0.3296(3) 1.0761(7) 0.1530(3) 0.0401(16) Uani d . 1 . . C H13A 0.3514 1.1562 0.1494 0.048 Uiso calc R 1 . . H H13B 0.2997 1.1027 0.1720 0.048 Uiso calc R 1 . . H C14 0.3716(3) 0.9777(7) 0.2016(3) 0.0344(14) Uani d . 1 . . C C15 0.4222(3) 1.0126(8) 0.2575(4) 0.0476(18) Uani d . 1 . . C H15 0.4340 1.1022 0.2659 0.057 Uiso calc R 1 . . H C16 0.4549(4) 0.9118(9) 0.3004(4) 0.059(2) Uani d . 1 . . C H16 0.4889 0.9337 0.3384 0.071 Uiso calc R 1 . . H C17 0.4379(3) 0.7788(8) 0.2880(4) 0.052(2) Uani d . 1 . . C H17 0.4600 0.7106 0.3170 0.063 Uiso calc R 1 . . H C18 0.3866(3) 0.7498(7) 0.2306(3) 0.0399(16) Uani d . 1 . . C C19 0.3628(3) 0.6109(7) 0.2110(4) 0.0505(19) Uani d . 1 . . C H19A 0.3945 0.5506 0.2108 0.061 Uiso calc R 1 . . H H19B 0.3461 0.5771 0.2444 0.061 Uiso calc R 1 . . H Cl1 0.45259(9) 0.3448(2) 0.11403(12) 0.0582(5) Uani d . 1 . . Cl Cl2 0.21960(9) 0.38082(18) 0.17381(10) 0.0492(5) Uani d . 1 . . Cl H20 0.297(3) 0.546(5) 0.133(4) 0.07(3) Uiso d D 1 . . H loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Fe1 0.0316(5) 0.0293(5) 0.0298(5) -0.0013(4) 0.0104(4) -0.0016(4) O1 0.051(3) 0.035(3) 0.047(3) -0.005(2) 0.015(2) 0.003(2) O2 0.034(4) 0.058(4) 0.037(4) -0.005(3) 0.008(3) -0.011(3) O3 0.122(7) 0.235(12) 0.093(6) 0.048(7) 0.062(6) 0.026(7) O4 0.092(5) 0.110(6) 0.157(8) -0.039(5) 0.047(5) -0.045(6) O5 0.112(7) 0.067(5) 0.179(9) 0.026(5) 0.015(6) 0.040(5) O6 0.063(4) 0.077(5) 0.185(8) -0.003(4) 0.069(5) -0.010(5) O7 0.064(4) 0.144(7) 0.094(5) 0.021(5) 0.002(4) 0.024(5) O8 0.087(4) 0.051(3) 0.064(3) -0.016(3) 0.046(3) -0.008(3) O9 0.121(6) 0.045(3) 0.080(4) -0.010(3) 0.056(4) -0.015(3) O10 0.101(5) 0.044(3) 0.069(4) 0.000(3) 0.040(4) 0.012(3) N1 0.033(3) 0.044(3) 0.031(3) -0.004(2) 0.011(2) -0.010(2) N2 0.033(3) 0.030(3) 0.036(3) 0.003(2) 0.012(2) 0.003(2) N3 0.037(3) 0.043(3) 0.035(3) -0.004(3) 0.015(2) -0.001(2) N4 0.034(3) 0.043(3) 0.031(3) -0.001(2) 0.011(2) 0.001(2) C1 0.043(4) 0.051(4) 0.043(4) -0.001(3) 0.019(3) -0.004(3) C2 0.045(4) 0.074(6) 0.057(5) -0.006(4) 0.025(4) -0.004(4) C3 0.036(4) 0.081(7) 0.071(6) -0.006(4) 0.021(4) -0.025(5) C4 0.032(4) 0.049(4) 0.064(5) 0.009(3) 0.006(4) -0.015(4) C5 0.036(4) 0.045(4) 0.032(3) 0.003(3) 0.002(3) -0.007(3) C6 0.038(4) 0.037(4) 0.043(4) 0.006(3) 0.005(3) 0.001(3) C7 0.059(4) 0.030(4) 0.046(4) -0.005(3) 0.022(4) 0.006(3) C8 0.031(3) 0.040(4) 0.042(4) -0.007(3) 0.007(3) 0.001(3) C9 0.040(4) 0.053(5) 0.059(5) -0.013(4) 0.020(4) 0.008(4) C10 0.045(4) 0.073(6) 0.071(6) -0.011(4) 0.033(4) -0.005(5) C11 0.038(4) 0.057(5) 0.057(5) 0.000(3) 0.022(4) -0.013(4) C12 0.039(4) 0.043(4) 0.043(4) 0.002(3) 0.010(3) -0.006(3) C13 0.042(4) 0.036(4) 0.037(4) -0.005(3) 0.009(3) -0.007(3) C14 0.037(4) 0.037(4) 0.030(3) -0.005(3) 0.011(3) -0.005(3) C15 0.043(4) 0.055(5) 0.038(4) -0.009(3) 0.007(3) -0.006(3) C16 0.051(5) 0.075(6) 0.040(4) -0.018(4) 0.003(4) 0.000(4) C17 0.039(4) 0.063(5) 0.045(4) 0.010(4) 0.004(3) 0.012(4) C18 0.041(4) 0.041(4) 0.039(4) 0.000(3) 0.017(3) 0.001(3) C19 0.061(5) 0.046(4) 0.046(4) 0.013(4) 0.020(4) 0.012(3) Cl1 0.0503(11) 0.0496(11) 0.0760(14) 0.0032(9) 0.0245(10) 0.0023(10) Cl2 0.0592(11) 0.0429(10) 0.0476(10) -0.0020(8) 0.0218(9) 0.0027(8) 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' Fe Fe 0.3463 0.8444 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' loop_ _audit_creation_method SHELXL-97 loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle_site_symmetry_3 _geom_angle _geom_angle_publ_flag O2 Fe1 O1 . 105.26(15) yes O2 Fe1 N1 . 94.12(14) yes O1 Fe1 N1 . 105.2(2) yes O2 Fe1 N4 . 172.06(15) yes O1 Fe1 N4 . 73.8(2) yes N1 Fe1 N4 . 93.7(2) yes O2 Fe1 N3 . 89.61(14) yes O1 Fe1 N3 . 97.2(2) yes N1 Fe1 N3 . 155.3(2) yes N4 Fe1 N3 . 82.7(2) yes O2 Fe1 N2 . 102.90(14) yes O1 Fe1 N2 . 151.4(2) yes N1 Fe1 N2 . 77.1(2) yes N4 Fe1 N2 . 77.6(2) yes N3 Fe1 N2 . 78.3(2) yes C19 O1 Fe1 . 122.1(4) ? C19 O1 H20 . 109(6) ? Fe1 O1 H20 . 127(6) ? Fe1 O2 Fe1 7_565 180.00(5) yes C1 N1 C5 . 119.1(6) ? C1 N1 Fe1 . 126.0(5) ? C5 N1 Fe1 . 114.5(4) ? C7 N2 C6 . 111.1(5) ? C7 N2 C13 . 112.6(5) ? C6 N2 C13 . 110.3(5) ? C7 N2 Fe1 . 107.3(4) ? C6 N2 Fe1 . 104.5(4) ? C13 N2 Fe1 . 110.6(4) ? C8 N3 C12 . 120.2(6) ? C8 N3 Fe1 . 115.5(4) ? C12 N3 Fe1 . 123.8(5) ? C18 N4 C14 . 120.9(6) ? C18 N4 Fe1 . 119.1(5) ? C14 N4 Fe1 . 117.4(4) ? N1 C1 C2 . 122.4(7) ? N1 C1 H1 . 118.8 ? C2 C1 H1 . 118.8 ? C3 C2 C1 . 118.4(8) ? C3 C2 H2 . 120.8 ? C1 C2 H2 . 120.8 ? C4 C3 C2 . 120.5(7) ? C4 C3 H3 . 119.8 ? C2 C3 H3 . 119.8 ? C3 C4 C5 . 118.6(7) ? C3 C4 H4 . 120.7 ? C5 C4 H4 . 120.7 ? N1 C5 C4 . 121.1(7) ? N1 C5 C6 . 116.1(6) ? C4 C5 C6 . 122.7(7) ? N2 C6 C5 . 109.5(5) ? N2 C6 H6A . 109.8 ? C5 C6 H6A . 109.8 ? N2 C6 H6B . 109.8 ? C5 C6 H6B . 109.8 ? H6A C6 H6B . 108.2 ? N2 C7 C8 . 113.0(5) ? N2 C7 H7A . 109.0 ? C8 C7 H7A . 109.0 ? N2 C7 H7B . 109.0 ? C8 C7 H7B . 109.0 ? H7A C7 H7B . 107.8 ? N3 C8 C9 . 120.7(7) ? N3 C8 C7 . 117.4(6) ? C9 C8 C7 . 121.6(6) ? C10 C9 C8 . 118.6(7) ? C10 C9 H9 . 120.7 ? C8 C9 H9 . 120.7 ? C11 C10 C9 . 119.7(7) ? C11 C10 H10 . 120.1 ? C9 C10 H10 . 120.1 ? C12 C11 C10 . 119.7(7) ? C12 C11 H11 . 120.2 ? C10 C11 H11 . 120.2 ? N3 C12 C11 . 121.1(7) ? N3 C12 H12 . 119.5 ? C11 C12 H12 . 119.5 ? C14 C13 N2 . 111.4(5) ? C14 C13 H13A . 109.3 ? N2 C13 H13A . 109.3 ? C14 C13 H13B . 109.3 ? N2 C13 H13B . 109.3 ? H13A C13 H13B . 108.0 ? N4 C14 C15 . 120.5(6) ? N4 C14 C13 . 114.6(5) ? C15 C14 C13 . 124.8(6) ? C16 C15 C14 . 118.5(7) ? C16 C15 H15 . 120.8 ? C14 C15 H15 . 120.8 ? C15 C16 C17 . 121.1(7) ? C15 C16 H16 . 119.5 ? C17 C16 H16 . 119.5 ? C16 C17 C18 . 117.8(7) ? C16 C17 H17 . 121.1 ? C18 C17 H17 . 121.1 ? N4 C18 C17 . 121.2(7) ? N4 C18 C19 . 115.1(6) ? C17 C18 C19 . 123.7(7) ? O1 C19 C18 . 107.5(6) ? O1 C19 H19A . 110.2 ? C18 C19 H19A . 110.2 ? O1 C19 H19B . 110.2 ? C18 C19 H19B . 110.2 ? H19A C19 H19B . 108.5 ? O5 Cl1 O4 . 114.0(6) ? O5 Cl1 O3 . 107.5(7) ? O4 Cl1 O3 . 106.3(6) ? O5 Cl1 O6 . 111.7(5) ? O4 Cl1 O6 . 109.8(5) ? O3 Cl1 O6 . 107.2(5) ? O7 Cl2 O10 . 110.2(5) ? O7 Cl2 O9 . 111.9(5) ? O10 Cl2 O9 . 110.7(4) ? O7 Cl2 O8 . 107.5(4) ? O10 Cl2 O8 . 107.9(4) ? O9 Cl2 O8 . 108.7(4) ? loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_site_symmetry_2 _geom_bond_distance _geom_bond_publ_flag Fe1 O2 . 1.7896(9) yes Fe1 O1 . 2.052(5) yes Fe1 N1 . 2.117(5) yes Fe1 N4 . 2.132(5) yes Fe1 N3 . 2.134(5) yes Fe1 N2 . 2.196(5) yes O1 C19 . 1.455(9) ? O1 H20 . 0.84(6) ? O2 Fe1 7_565 1.7896(9) ? O3 Cl1 . 1.409(8) ? O4 Cl1 . 1.404(8) ? O5 Cl1 . 1.378(7) ? O6 Cl1 . 1.418(6) ? O7 Cl2 . 1.413(7) ? O8 Cl2 . 1.454(5) ? O9 Cl2 . 1.423(6) ? O10 Cl2 . 1.415(6) ? N1 C1 . 1.346(9) ? N1 C5 . 1.349(9) ? N2 C7 . 1.492(8) ? N2 C6 . 1.492(8) ? N2 C13 . 1.499(8) ? N3 C8 . 1.332(8) ? N3 C12 . 1.351(8) ? N4 C18 . 1.328(8) ? N4 C14 . 1.354(8) ? C1 C2 . 1.376(10) ? C1 H1 . 0.9300 ? C2 C3 . 1.374(12) ? C2 H2 . 0.9300 ? C3 C4 . 1.374(11) ? C3 H3 . 0.9300 ? C4 C5 . 1.396(9) ? C4 H4 . 0.9300 ? C5 C6 . 1.510(10) ? C6 H6A . 0.9700 ? C6 H6B . 0.9700 ? C7 C8 . 1.498(9) ? C7 H7A . 0.9700 ? C7 H7B . 0.9700 ? C8 C9 . 1.395(9) ? C9 C10 . 1.378(11) ? C9 H9 . 0.9300 ? C10 C11 . 1.365(11) ? C10 H10 . 0.9300 ? C11 C12 . 1.363(10) ? C11 H11 . 0.9300 ? C12 H12 . 0.9300 ? C13 C14 . 1.496(9) ? C13 H13A . 0.9700 ? C13 H13B . 0.9700 ? C14 C15 . 1.379(9) ? C15 C16 . 1.376(11) ? C15 H15 . 0.9300 ? C16 C17 . 1.377(11) ? C16 H16 . 0.9300 ? C17 C18 . 1.393(10) ? C17 H17 . 0.9300 ? C18 C19 . 1.491(10) ? C19 H19A . 0.9700 ? C19 H19B . 0.9700 ? loop_ _geom_hbond_atom_site_label_D _geom_hbond_atom_site_label_H _geom_hbond_atom_site_label_A _geom_hbond_distance_DH _geom_hbond_distance_HA _geom_hbond_distance_DA _geom_hbond_angle_DHA O1 H20 O8 0.84(6) 1.82(3) 2.654(7) 169(8)