#------------------------------------------------------------------------------ #$Date: 2012-02-03 17:16:24 +0000 (Fri, 03 Feb 2012) $ #$Revision: 32112 $ #$URL: svn://www.crystallography.net/cod/cif/2/01/28/2012833.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_2012833 loop_ _publ_author_name 'Choi, Jong-Ha' 'Suzuki, Takayoshi' 'Subhan, Md. Abdus' 'Kaizaki, Sumio' 'Park, Yu Chul' _publ_section_title ;Ethylenediammonium bis{bis[N-(2-aminoethyl)glycinato-\k^3^N,N',O]chromium(III)} tetrachloride dihydrate at 293 and 100 K ; _journal_issue 7 _journal_name_full 'Acta Crystallographica Section C' _journal_page_first m409 _journal_page_last m412 _journal_volume 58 _journal_year 2002 _chemical_formula_iupac '(C2 H10 N2) [Cr (C4 H9 N2 O2)2]2 Cl4 , 2H2 O' _chemical_formula_moiety 'C2 H10 N2 2+ , 2C8 H18 Cr N4 O4 + , 4Cl - , 2H2 O' _chemical_formula_sum 'C18 H50 Cl4 Cr2 N10 O10' _chemical_formula_weight 812.48 _chemical_name_systematic ;Ethylenediammonium bis{bis[N-(2-aminoethyl)glycinato-\k^3^N,N',O]chromium(III)} tetrachloride dihydrate ; _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 difmap _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_method SHELXL97 _cell_angle_alpha 90 _cell_angle_beta 95.9390(10) _cell_angle_gamma 90 _cell_formula_units_Z 2 _cell_length_a 12.5546(4) _cell_length_b 7.49070(10) _cell_length_c 18.1157(4) _cell_measurement_reflns_used 12063 _cell_measurement_temperature 100(2) _cell_measurement_theta_max 27.5 _cell_measurement_theta_min 2.9 _cell_volume 1694.51(7) _computing_cell_refinement PROCESS-AUTO _computing_data_collection 'PROCESS-AUTO (Rigaku Corporation, 1998)' _computing_data_reduction 'TEXSAN (Molecular Structure Corporation & Rigaku Corporation, 2000)' _computing_molecular_graphics 'ORTEP (Johnson, 1970)' _computing_publication_material SHELXL97 _computing_structure_refinement 'SHELXL97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS86 (Sheldrick, 1990)' _diffrn_ambient_temperature 100(2) _diffrn_detector_area_resol_mean 10.00 _diffrn_measured_fraction_theta_full 1.000 _diffrn_measured_fraction_theta_max 1.000 _diffrn_measurement_device_type 'Rigaku R-AXIS RAPID imaging-plate' _diffrn_measurement_method \w _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_type 'Mo K\a' _diffrn_radiation_wavelength 0.71069 _diffrn_reflns_av_R_equivalents 0.023 _diffrn_reflns_av_sigmaI/netI 0.017 _diffrn_reflns_limit_h_max 16 _diffrn_reflns_limit_h_min -16 _diffrn_reflns_limit_k_max 9 _diffrn_reflns_limit_k_min -9 _diffrn_reflns_limit_l_max 23 _diffrn_reflns_limit_l_min -23 _diffrn_reflns_number 15950 _diffrn_reflns_theta_full 27.48 _diffrn_reflns_theta_max 27.48 _diffrn_reflns_theta_min 2.26 _exptl_absorpt_coefficient_mu 1.019 _exptl_absorpt_correction_T_max 0.832 _exptl_absorpt_correction_T_min 0.733 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details '(Higashi, 1995)' _exptl_crystal_colour orange _exptl_crystal_density_diffrn 1.592 _exptl_crystal_density_meas 'not measured' _exptl_crystal_density_method 'not measured' _exptl_crystal_description 'hexagonal column' _exptl_crystal_F_000 848 _exptl_crystal_size_max 0.22 _exptl_crystal_size_mid 0.22 _exptl_crystal_size_min 0.18 _refine_diff_density_max 0.39 _refine_diff_density_min -0.42 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.063 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 202 _refine_ls_number_reflns 3894 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.063 _refine_ls_R_factor_all 0.026 _refine_ls_R_factor_gt 0.022 _refine_ls_shift/su_max 0.004 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w = 1/[\s^2^(Fo^2^)+(0.0350P)^2^+0.5214P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.058 _refine_ls_wR_factor_ref 0.059 _reflns_number_gt 3514 _reflns_number_total 3894 _reflns_threshold_expression I>2\s(I) _[local]_cod_data_source_file ob1068.cif _[local]_cod_data_source_block II _[local]_cod_cif_authors_sg_H-M 'P 21/c' _cod_database_code 2012833 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_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 Cr 0.815487(15) 0.22047(3) 0.835642(11) 0.00845(6) Uani d . 1 . . Cr Cl1 0.50086(3) 0.09497(4) 0.401175(17) 0.01568(8) Uani d . 1 . . Cl Cl2 0.82955(2) -0.36846(4) 0.557911(17) 0.01550(8) Uani d . 1 . . Cl O1 0.91017(7) 0.41583(12) 0.81304(5) 0.01257(18) Uani d . 1 . . O O2 0.94615(8) 0.70537(12) 0.82684(5) 0.0158(2) Uani d . 1 . . O O3 0.71535(7) 0.03559(12) 0.85984(5) 0.01133(18) Uani d . 1 . . O O4 0.55393(8) -0.08189(13) 0.83089(5) 0.0170(2) Uani d . 1 . . O O6 0.68346(8) -0.37226(13) 0.69411(6) 0.0181(2) Uani d . 1 . . O N1 0.75537(9) 0.41489(14) 0.90299(6) 0.0109(2) Uani d . 1 . . N H01 0.6809 0.4108 0.8975 0.017 Uiso calc R 1 . . H N2 0.91146(9) 0.15156(15) 0.93086(6) 0.0139(2) Uani d . 1 . . N H02A 0.8862 0.0491 0.9510 0.017 Uiso calc R 1 . . H H02B 0.9804 0.1312 0.9200 0.017 Uiso calc R 1 . . H N3 0.70436(9) 0.25849(15) 0.74354(6) 0.0118(2) Uani d . 1 . . N H03 0.6888 0.3794 0.7379 0.017 Uiso calc R 1 . . H N4 0.89034(9) 0.05716(15) 0.76620(6) 0.0145(2) Uani d . 1 . . N H04A 0.9513 0.1115 0.7530 0.017 Uiso calc R 1 . . H H04B 0.9097 -0.0484 0.7899 0.017 Uiso calc R 1 . . H N5 0.40289(9) 0.32104(15) 0.52178(6) 0.0133(2) Uani d . 1 . . N H05A 0.4389 0.2292 0.5028 0.017 Uiso calc R 1 . . H H05B 0.3314 0.3078 0.5086 0.017 Uiso calc R 1 . . H H05C 0.4159 0.3208 0.5721 0.017 Uiso calc R 1 . . H C1 0.79186(10) 0.59218(17) 0.87838(7) 0.0127(3) Uani d . 1 . . C H1A 0.8085 0.6701 0.9222 0.017 Uiso calc R 1 . . H H1B 0.7335 0.6490 0.8456 0.017 Uiso calc R 1 . . H C2 0.89081(10) 0.57460(17) 0.83680(7) 0.0114(2) Uani d . 1 . . C C3 0.79574(11) 0.37062(19) 0.98120(7) 0.0160(3) Uani d . 1 . . C H3A 0.7493 0.2787 1.0006 0.017 Uiso calc R 1 . . H H3B 0.7937 0.4785 1.0126 0.017 Uiso calc R 1 . . H C4 0.90950(12) 0.30160(19) 0.98427(8) 0.0178(3) Uani d . 1 . . C H4A 0.9580 0.3981 0.9710 0.017 Uiso calc R 1 . . H H4B 0.9340 0.2600 1.0351 0.017 Uiso calc R 1 . . H C5 0.60531(11) 0.15850(18) 0.75596(7) 0.0133(3) Uani d . 1 . . C H5A 0.5790 0.0942 0.7099 0.017 Uiso calc R 1 . . H H5B 0.5492 0.2442 0.7672 0.017 Uiso calc R 1 . . H C6 0.62410(10) 0.02565(17) 0.81911(7) 0.0116(2) Uani d . 1 . . C C7 0.75585(12) 0.19248(19) 0.67789(7) 0.0171(3) Uani d . 1 . . C H7A 0.8062 0.2834 0.6623 0.017 Uiso calc R 1 . . H H7B 0.7005 0.1703 0.6359 0.017 Uiso calc R 1 . . H C8 0.81542(12) 0.02128(19) 0.69897(8) 0.0184(3) Uani d . 1 . . C H8A 0.7642 -0.0738 0.7093 0.017 Uiso calc R 1 . . H H8B 0.8557 -0.0188 0.6578 0.017 Uiso calc R 1 . . H C9 0.43963(10) 0.49316(18) 0.49209(7) 0.0135(3) Uani d . 1 . . C H9A 0.4052 0.5940 0.5158 0.017 Uiso calc R 1 . . H H9B 0.4189 0.4993 0.4379 0.017 Uiso calc R 1 . . H H06A 0.7253(14) -0.3623 0.6583 0.017 Uiso d . 1 . . H H06B 0.6261(14) -0.3201 0.6766 0.017 Uiso 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 Cr 0.00883(10) 0.00766(10) 0.00905(10) -0.00073(7) 0.00184(7) -0.00010(7) Cl1 0.01474(16) 0.01790(16) 0.01471(15) -0.00112(12) 0.00298(11) -0.00408(12) Cl2 0.01152(15) 0.01959(16) 0.01525(15) 0.00006(12) 0.00078(11) -0.00217(12) O1 0.0137(4) 0.0095(4) 0.0153(4) -0.0009(3) 0.0054(4) -0.0009(4) O2 0.0162(5) 0.0109(4) 0.0209(5) -0.0021(4) 0.0054(4) 0.0002(4) O3 0.0106(4) 0.0116(4) 0.0116(4) -0.0017(3) 0.0000(3) 0.0012(3) O4 0.0161(5) 0.0204(5) 0.0142(4) -0.0082(4) -0.0006(4) 0.0012(4) O6 0.0172(5) 0.0178(5) 0.0196(5) 0.0003(4) 0.0036(4) 0.0032(4) N1 0.0109(5) 0.0114(5) 0.0106(5) -0.0023(4) 0.0022(4) -0.0011(4) N2 0.0102(5) 0.0144(5) 0.0167(5) -0.0016(4) -0.0009(4) 0.0022(5) N3 0.0160(6) 0.0105(5) 0.0092(5) -0.0009(4) 0.0021(4) 0.0006(4) N4 0.0160(6) 0.0097(5) 0.0191(6) -0.0003(4) 0.0077(5) 0.0000(4) N5 0.0111(5) 0.0154(5) 0.0135(5) -0.0010(4) 0.0020(4) -0.0022(4) C1 0.0138(6) 0.0100(6) 0.0150(6) -0.0003(5) 0.0050(5) -0.0014(5) C2 0.0124(6) 0.0114(6) 0.0104(5) 0.0012(5) 0.0003(5) 0.0009(5) C3 0.0227(7) 0.0166(6) 0.0088(6) -0.0039(5) 0.0027(5) -0.0005(5) C4 0.0202(7) 0.0188(7) 0.0131(6) -0.0064(5) -0.0045(5) 0.0004(5) C5 0.0131(6) 0.0157(6) 0.0107(6) -0.0017(5) -0.0010(5) 0.0014(5) C6 0.0133(6) 0.0124(6) 0.0092(5) -0.0008(5) 0.0018(4) -0.0021(5) C7 0.0230(7) 0.0201(7) 0.0089(6) -0.0036(6) 0.0052(5) -0.0006(5) C8 0.0241(7) 0.0163(7) 0.0161(6) -0.0032(5) 0.0088(5) -0.0068(5) C9 0.0114(6) 0.0146(6) 0.0143(6) -0.0008(5) 0.0007(5) -0.0006(5) 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 Cr O1 . 1.9552(9) yes Cr O3 . 1.9505(9) yes Cr N1 . 2.0904(11) yes Cr N2 . 2.0649(11) yes Cr N3 . 2.0807(11) yes Cr N4 . 2.0511(11) yes O1 C2 . 1.2963(15) no O2 C2 . 1.2250(16) no O3 C6 . 1.2991(15) no O4 C6 . 1.2286(16) no O6 H06A . 0.879(12) no O6 H06B . 0.851(14) no N1 C1 . 1.4882(16) no N1 C3 . 1.4917(16) no N1 H01 . 0.9300 no N2 C4 . 1.4849(18) no N2 H02A . 0.9200 no N2 H02B . 0.9200 no N3 C5 . 1.4886(17) no N3 C7 . 1.4953(17) no N3 H03 . 0.9300 no N4 C8 . 1.4843(18) no N4 H04A . 0.9200 no N4 H04B . 0.9200 no N5 C9 . 1.4885(17) no N5 H05A . 0.9100 no N5 H05B . 0.9100 no N5 H05C . 0.9100 no C1 C2 . 1.5237(18) no C1 H1A . 0.9900 no C1 H1B . 0.9900 no C3 C4 . 1.515(2) no C3 H3A . 0.9900 no C3 H3B . 0.9900 no C4 H4A . 0.9900 no C4 H4B . 0.9900 no C5 C6 . 1.5162(18) no C5 H5A . 0.9900 no C5 H5B . 0.9900 no C7 C8 . 1.514(2) no C7 H7A . 0.9900 no C7 H7B . 0.9900 no C8 H8A . 0.9900 no C8 H8B . 0.9900 no C9 C9 3_666 1.517(2) no C9 H9A . 0.9900 no C9 H9B . 0.9900 no 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' Cr Cr 0.3209 0.6236 '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_site_symmetry_1 _geom_angle_site_symmetry_3 _geom_angle _geom_angle_publ_flag O1 Cr O3 . . 176.77(4) yes O1 Cr N1 . . 82.23(4) yes O1 Cr N2 . . 92.70(4) yes O1 Cr N3 . . 95.82(4) yes O1 Cr N4 . . 89.48(4) yes O3 Cr N1 . . 94.79(4) yes O3 Cr N2 . . 88.21(4) yes O3 Cr N3 . . 83.29(4) yes O3 Cr N4 . . 93.51(4) yes N1 Cr N2 . . 84.33(4) yes N1 Cr N3 . . 96.89(4) yes N1 Cr N4 . . 171.70(4) yes N2 Cr N3 . . 171.48(4) yes N2 Cr N4 . . 95.65(5) yes N3 Cr N4 . . 84.35(5) yes C2 O1 Cr . . 118.57(8) no C6 O3 Cr . . 117.65(8) no H06A O6 H06B . . 103.5(9) no C1 N1 C3 . . 113.46(10) no C1 N1 Cr . . 107.81(8) no C3 N1 Cr . . 106.96(8) no C1 N1 H01 . . 109.5 no C3 N1 H01 . . 109.5 no Cr N1 H01 . . 109.5 no C4 N2 Cr . . 107.91(8) no C4 N2 H02A . . 110.1 no Cr N2 H02A . . 110.1 no C4 N2 H02B . . 110.1 no Cr N2 H02B . . 110.1 no H02A N2 H02B . . 108.4 no C5 N3 C7 . . 112.98(10) no C5 N3 Cr . . 108.14(7) no C7 N3 Cr . . 106.46(8) no C5 N3 H03 . . 109.7 no C7 N3 H03 . . 109.7 no Cr N3 H03 . . 109.7 no C8 N4 Cr . . 108.64(8) no C8 N4 H04A . . 110.0 no Cr N4 H04A . . 110.0 no C8 N4 H04B . . 110.0 no Cr N4 H04B . . 110.0 no H04A N4 H04B . . 108.3 no C9 N5 H05A . . 109.5 no C9 N5 H05B . . 109.5 no H05A N5 H05B . . 109.5 no C9 N5 H05C . . 109.5 no H05A N5 H05C . . 109.5 no H05B N5 H05C . . 109.5 no N1 C1 C2 . . 111.29(10) no N1 C1 H1A . . 109.4 no C2 C1 H1A . . 109.4 no N1 C1 H1B . . 109.4 no C2 C1 H1B . . 109.4 no H1A C1 H1B . . 108.0 no O2 C2 O1 . . 123.79(12) no O2 C2 C1 . . 120.50(11) no O1 C2 C1 . . 115.71(11) no N1 C3 C4 . . 109.70(11) no N1 C3 H3A . . 109.7 no C4 C3 H3A . . 109.7 no N1 C3 H3B . . 109.7 no C4 C3 H3B . . 109.7 no H3A C3 H3B . . 108.2 no N2 C4 C3 . . 108.27(11) no N2 C4 H4A . . 110.0 no C3 C4 H4A . . 110.0 no N2 C4 H4B . . 110.0 no C3 C4 H4B . . 110.0 no H4A C4 H4B . . 108.4 no N3 C5 C6 . . 112.15(10) no N3 C5 H5A . . 109.2 no C6 C5 H5A . . 109.2 no N3 C5 H5B . . 109.2 no C6 C5 H5B . . 109.2 no H5A C5 H5B . . 107.9 no O4 C6 O3 . . 123.02(12) no O4 C6 C5 . . 120.20(11) no O3 C6 C5 . . 116.76(11) no N3 C7 C8 . . 108.82(11) no N3 C7 H7A . . 109.9 no C8 C7 H7A . . 109.9 no N3 C7 H7B . . 109.9 no C8 C7 H7B . . 109.9 no H7A C7 H7B . . 108.3 no N4 C8 C7 . . 107.95(11) no N4 C8 H8A . . 110.1 no C7 C8 H8A . . 110.1 no N4 C8 H8B . . 110.1 no C7 C8 H8B . . 110.1 no H8A C8 H8B . . 108.4 no N5 C9 C9 . 3_666 109.35(13) no N5 C9 H9A . . 109.8 no C9 C9 H9A 3_666 . 109.8 no N5 C9 H9B . . 109.8 no C9 C9 H9B 3_666 . 109.8 no H9A C9 H9B . . 108.3 no loop_ _geom_hbond_atom_site_label_D _geom_hbond_atom_site_label_H _geom_hbond_atom_site_label_A _geom_hbond_site_symmetry_A _geom_hbond_distance_DH _geom_hbond_distance_HA _geom_hbond_distance_DA _geom_hbond_angle_DHA _geom_hbond_publ_flag N1 H01 Cl1 4_566 0.93 2.27 3.1930(10) 172 yes N2 H02A Cl2 4_556 0.92 2.53 3.3680(10) 152 yes N2 H02B Cl2 2_756 0.92 2.38 3.2400(10) 156 yes N3 H03 O6 1_565 0.93 2.02 2.911(2) 160 yes N4 H04A O2 2_746 0.92 2.15 3.001(2) 153 yes N4 H04A O1 2_746 0.92 2.65 3.1930(10) 118 yes N4 H04B O2 1_545 0.92 2.00 2.9130(10) 172 yes N5 H05A Cl1 1_555 0.91 2.30 3.1160(10) 149 yes N5 H05B Cl2 3_656 0.91 2.29 3.1390(10) 155 yes N5 H05C O4 2_656 0.91 1.90 2.7650(10) 157 yes O6 H06A Cl2 1_555 0.879(12) 2.349(11) 3.2230(10) 173.3(5) yes O6 H06B Cl1 3_656 0.851(14) 2.628(10) 3.4380(10) 160.0(10) yes 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 _geom_torsion_publ_flag N4 Cr O1 C2 171.58(10) no N2 Cr O1 C2 -92.79(9) no N3 Cr O1 C2 87.31(9) no N1 Cr O1 C2 -8.89(9) no N4 Cr O3 C6 -91.43(9) no N2 Cr O3 C6 173.02(9) no N3 Cr O3 C6 -7.54(9) no N1 Cr O3 C6 88.86(9) no O3 Cr N1 C1 -161.74(8) no O1 Cr N1 C1 17.03(8) no N2 Cr N1 C1 110.55(8) no N3 Cr N1 C1 -77.94(8) no O3 Cr N1 C3 75.91(8) no O1 Cr N1 C3 -105.33(8) no N2 Cr N1 C3 -11.81(8) no N3 Cr N1 C3 159.71(8) no O3 Cr N2 C4 -111.34(9) no O1 Cr N2 C4 65.57(9) no N4 Cr N2 C4 155.31(9) no N1 Cr N2 C4 -16.35(9) no O3 Cr N3 C5 12.12(8) no O1 Cr N3 C5 -164.76(8) no N4 Cr N3 C5 106.35(8) no N1 Cr N3 C5 -81.91(8) no O3 Cr N3 C7 -109.56(8) no O1 Cr N3 C7 73.56(8) no N4 Cr N3 C7 -15.33(8) no N1 Cr N3 C7 156.41(8) no O3 Cr N4 C8 69.44(9) no O1 Cr N4 C8 -109.35(9) no N2 Cr N4 C8 157.98(9) no N3 Cr N4 C8 -13.46(8) no C3 N1 C1 C2 96.15(12) no Cr N1 C1 C2 -22.11(12) no Cr O1 C2 O2 178.66(10) no Cr O1 C2 C1 -2.03(14) no N1 C1 C2 O2 -163.63(12) no N1 C1 C2 O1 17.04(15) no C1 N1 C3 C4 -80.87(13) no Cr N1 C3 C4 37.88(12) no Cr N2 C4 C3 41.28(12) no N1 C3 C4 N2 -53.69(14) no C7 N3 C5 C6 102.84(12) no Cr N3 C5 C6 -14.72(12) no Cr O3 C6 O4 -177.64(10) no Cr O3 C6 C5 0.67(15) no N3 C5 C6 O4 -171.52(11) no N3 C5 C6 O3 10.12(16) no C5 N3 C7 C8 -77.30(14) no Cr N3 C7 C8 41.25(12) no Cr N4 C8 C7 39.56(12) no N3 C7 C8 N4 -54.53(14) no