#------------------------------------------------------------------------------ #$Date: 2016-03-22 22:39:36 +0000 (Tue, 22 Mar 2016) $ #$Revision: 179121 $ #$URL: svn://www.crystallography.net/cod/cif/4/30/83/4308377.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_4308377 loop_ _publ_author_name 'Daniel T. de Lill' 'Noel S. Gunning' 'Christopher L. Cahill' _publ_contact_author_address ; Department of Chemistry George Washington University 725 21st Street, NW Washington, DC 20052 ; _publ_contact_author_email cahill@gwu.edu _publ_contact_author_fax 202-994-5873 _publ_contact_author_name 'Christopher L. Cahill' _publ_contact_author_phone 202-994-6959 _publ_section_title ; Toward Templated Metal-Organic Frameworks: Synthesis, Structures, Thermal Properties, and Luminescence of Three Novel Lanthanide-Adipate Frameworks ; _journal_name_full 'Inorganic Chemistry' _journal_page_first 258 _journal_page_last 266 _journal_paper_doi 10.1021/ic048755k _journal_volume 44 _journal_year 2005 _chemical_formula_sum 'C14 H18 N O7 Pr' _chemical_formula_weight 453.20 _chemical_name_systematic ; ? ; _space_group_IT_number 60 _symmetry_cell_setting orthorhombic _symmetry_space_group_name_Hall '-P 2n 2ab' _symmetry_space_group_name_H-M 'P b c n' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _audit_creation_method SHELXL-97 _cell_angle_alpha 90.00 _cell_angle_beta 90.00 _cell_angle_gamma 90.00 _cell_formula_units_Z 8 _cell_length_a 21.9415(10) _cell_length_b 7.7878(3) _cell_length_c 19.6649(9) _cell_measurement_reflns_used 5492 _cell_measurement_temperature 293(2) _cell_measurement_theta_max 28.07 _cell_measurement_theta_min 2.27 _cell_volume 3360.3(3) _computing_cell_refinement 'SAINT (Bruker-AXS)' _computing_data_collection 'SMART V5.05 (Bruker-AXS)' _computing_data_reduction 'SAINT (Bruker-AXS)' _computing_publication_material 'WINGX (Farrugia, 1998)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS-97 (Sheldrick, 1990)' _diffrn_ambient_temperature 293(2) _diffrn_measured_fraction_theta_full 0.987 _diffrn_measured_fraction_theta_max 0.987 _diffrn_measurement_device_type 'Bruker Apex CCD' _diffrn_measurement_method 'omega and Phi 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 0.0466 _diffrn_reflns_av_sigmaI/netI 0.0355 _diffrn_reflns_limit_h_max 29 _diffrn_reflns_limit_h_min -31 _diffrn_reflns_limit_k_max 5 _diffrn_reflns_limit_k_min -11 _diffrn_reflns_limit_l_max 27 _diffrn_reflns_limit_l_min -28 _diffrn_reflns_number 30416 _diffrn_reflns_theta_full 30.52 _diffrn_reflns_theta_max 30.52 _diffrn_reflns_theta_min 1.86 _exptl_absorpt_coefficient_mu 2.933 _exptl_absorpt_correction_T_max 0.8672 _exptl_absorpt_correction_T_min 0.5779 _exptl_absorpt_correction_type empirical _exptl_absorpt_process_details SADABS _exptl_crystal_colour 'light green' _exptl_crystal_density_diffrn 1.792 _exptl_crystal_density_method 'not measured' _exptl_crystal_description blade _exptl_crystal_F_000 1792 _exptl_crystal_size_max 0.21 _exptl_crystal_size_mid 0.08 _exptl_crystal_size_min 0.05 _refine_diff_density_max 0.991 _refine_diff_density_min -1.395 _refine_diff_density_rms 0.135 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.091 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 199 _refine_ls_number_reflns 5073 _refine_ls_number_restraints 4 _refine_ls_restrained_S_all 1.134 _refine_ls_R_factor_all 0.0573 _refine_ls_R_factor_gt 0.0434 _refine_ls_shift/su_max 0.003 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0348P)^2^+7.5594P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.0907 _refine_ls_wR_factor_ref 0.0962 _reflns_number_gt 4155 _reflns_number_total 5073 _reflns_threshold_expression >2sigma(I) _cod_data_source_file ic048755ksi20040906_100304_1.cif _cod_data_source_block pbcn _cod_database_code 4308377 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, -y+1/2, z+1/2' '-x, y, -z+1/2' 'x+1/2, -y+1/2, -z' '-x, -y, -z' 'x-1/2, y-1/2, -z-1/2' 'x, -y, z-1/2' '-x-1/2, y-1/2, 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 _atom_site_disorder_assembly _atom_site_disorder_group Pr1 Pr 0.281278(10) 0.57803(2) 0.055639(11) 0.02307(7) Uani 1 1 d . . . O1 O 0.16737(14) 0.5539(4) 0.05631(18) 0.0363(7) Uani 1 1 d . . . O2 O 0.24907(14) 0.8333(4) -0.01929(15) 0.0323(6) Uani 1 1 d . . . O3 O 0.36101(14) 0.7857(4) 0.07558(19) 0.0380(7) Uani 1 1 d . . . O4 O 0.32081(18) 0.6691(4) -0.06078(18) 0.0468(9) Uani 1 1 d . . . O5 O 0.26276(13) 0.3076(4) 0.12526(15) 0.0302(6) Uani 1 1 d . . . O6 O 0.32003(15) 0.4967(4) 0.17525(17) 0.0403(8) Uani 1 1 d . . . O7 O 0.37167(14) 0.3912(4) 0.03622(17) 0.0327(7) Uani 1 1 d . . . H7A H 0.3624 0.2881 0.0424 0.039 Uiso 1 1 d R . . H7B H 0.3943 0.3958 -0.0058 0.039 Uiso 1 1 d R . . N1 N 0.4367(2) 0.4048(6) 0.9153(2) 0.0468(10) Uani 1 1 d . . . C1 C 0.2914(2) 0.8042(6) -0.0629(2) 0.0329(10) Uani 1 1 d . . . C7 C 0.12760(19) 0.4404(5) 0.0685(2) 0.0293(9) Uani 1 1 d . . . C3 C 0.3538(4) 0.8957(7) -0.1671(3) 0.068(2) Uani 1 1 d . . . C2 C 0.3046(3) 0.9406(6) -0.1149(3) 0.0460(12) Uani 1 1 d . . . H2A H 0.3169 1.0441 -0.0912 0.055 Uiso 1 1 calc R . . H2B H 0.2671 0.9663 -0.1390 0.055 Uiso 1 1 calc R . . C8 C 0.06175(19) 0.4955(6) 0.0709(3) 0.0352(10) Uani 1 1 d . . . H8A H 0.0591 0.6144 0.0853 0.042 Uiso 1 1 calc R . . H8B H 0.0397 0.4256 0.1035 0.042 Uiso 1 1 calc R . . C6 C 0.2988(2) 0.3507(6) 0.1729(2) 0.0378(10) Uani 1 1 d . . . C23 C 0.4866(2) 0.4019(6) 0.7850(2) 0.0349(10) Uani 1 1 d . . . C24 C 0.5220(2) 0.4383(7) 0.8416(3) 0.0425(11) Uani 1 1 d . . . H24 H 0.5633 0.4630 0.8369 0.051 Uiso 1 1 calc R . . C25 C 0.4953(3) 0.4376(7) 0.9046(3) 0.0483(13) Uani 1 1 d . . . H25 H 0.5197 0.4616 0.9421 0.058 Uiso 1 1 calc R . . C22 C 0.4255(2) 0.3670(7) 0.7955(3) 0.0474(12) Uani 1 1 d . . . H22 H 0.4000 0.3414 0.7591 0.057 Uiso 1 1 calc R . . C21 C 0.4031(2) 0.3710(8) 0.8611(3) 0.0512(14) Uani 1 1 d . . . H21 H 0.3619 0.3486 0.8676 0.061 Uiso 1 1 calc R . . C9 C 0.03345(19) 0.4756(6) 0.0011(3) 0.0387(11) Uani 1 1 d . . . H9A H 0.0556 0.5470 -0.0309 0.046 Uiso 1 1 calc R . . H9B H 0.0378 0.3572 -0.0134 0.046 Uiso 1 1 calc R . . C4B C 0.3502(4) 0.2609(12) 0.2836(4) 0.0309(19) Uani 0.50 1 d PD . . C4A C 0.3091(7) 0.2152(16) 0.2850(6) 0.075(5) Uani 0.50 1 d PD . . C5A C 0.3353(6) 0.2184(15) 0.2138(5) 0.054(3) Uani 0.50 1 d PD . . C5B C 0.2989(5) 0.2110(14) 0.2275(5) 0.037(2) Uani 0.50 1 d PD . . 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 Pr1 0.02304(12) 0.01875(11) 0.02744(12) 0.00165(8) 0.00140(9) -0.00008(8) O1 0.0228(15) 0.0267(15) 0.059(2) 0.0024(14) -0.0012(14) 0.0018(11) O2 0.0383(17) 0.0279(14) 0.0307(15) -0.0008(12) 0.0022(14) 0.0019(13) O3 0.0258(16) 0.0252(15) 0.063(2) 0.0050(15) 0.0004(14) -0.0037(12) O4 0.065(2) 0.0341(17) 0.041(2) 0.0051(15) 0.0238(17) 0.0092(16) O5 0.0340(16) 0.0280(14) 0.0285(15) 0.0006(12) -0.0055(12) -0.0017(12) O6 0.0462(19) 0.0341(17) 0.0405(19) -0.0039(15) -0.0144(15) -0.0041(15) O7 0.0290(15) 0.0242(14) 0.0448(18) 0.0000(13) 0.0086(13) 0.0010(12) N1 0.050(3) 0.051(3) 0.039(2) 0.002(2) 0.013(2) 0.004(2) C1 0.044(3) 0.029(2) 0.026(2) -0.0008(16) -0.0014(18) -0.0057(18) C7 0.0215(19) 0.029(2) 0.037(2) -0.0042(17) -0.0039(16) 0.0023(16) C3 0.121(6) 0.052(3) 0.029(3) -0.015(2) 0.026(3) -0.045(4) C2 0.067(3) 0.037(3) 0.035(3) 0.008(2) 0.002(2) -0.008(2) C8 0.021(2) 0.032(2) 0.053(3) 0.002(2) 0.0019(19) 0.0015(17) C6 0.048(3) 0.033(2) 0.033(2) -0.0006(19) -0.009(2) 0.008(2) C23 0.031(2) 0.035(2) 0.038(2) 0.0033(19) 0.0025(19) 0.0040(18) C24 0.033(2) 0.055(3) 0.039(3) 0.002(2) 0.005(2) -0.003(2) C25 0.046(3) 0.063(3) 0.036(3) -0.003(2) 0.002(2) -0.001(3) C22 0.033(3) 0.059(3) 0.050(3) -0.001(3) 0.001(2) -0.004(2) C21 0.034(3) 0.069(4) 0.051(3) -0.004(3) 0.013(2) -0.006(3) C9 0.021(2) 0.039(2) 0.056(3) 0.001(2) -0.001(2) 0.0043(18) C4B 0.026(4) 0.042(5) 0.025(4) 0.016(4) 0.002(3) -0.011(4) C4A 0.125(13) 0.057(8) 0.042(7) 0.017(6) 0.040(8) 0.045(9) C5A 0.082(9) 0.043(6) 0.037(6) 0.009(5) -0.029(7) 0.020(7) C5B 0.040(5) 0.031(5) 0.041(6) 0.010(4) -0.012(5) -0.013(5) 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' Pr Pr -0.2180 2.8214 '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 _geom_angle_publ_flag O3 Pr1 O5 72.91(10) . 8_665 ? O3 Pr1 O7 80.75(10) . . ? O5 Pr1 O7 145.73(10) 8_665 . ? O3 Pr1 O2 143.09(11) . 8_655 ? O5 Pr1 O2 141.33(10) 8_665 8_655 ? O7 Pr1 O2 71.10(10) . 8_655 ? O3 Pr1 O1 140.51(10) . . ? O5 Pr1 O1 70.03(10) 8_665 . ? O7 Pr1 O1 138.72(10) . . ? O2 Pr1 O1 71.36(10) 8_655 . ? O3 Pr1 O5 125.64(10) . . ? O5 Pr1 O5 103.91(10) 8_665 . ? O7 Pr1 O5 74.10(10) . . ? O2 Pr1 O5 69.12(10) 8_655 . ? O1 Pr1 O5 77.06(10) . . ? O3 Pr1 O4 73.32(12) . . ? O5 Pr1 O4 115.66(10) 8_665 . ? O7 Pr1 O4 75.74(11) . . ? O2 Pr1 O4 76.90(11) 8_655 . ? O1 Pr1 O4 111.40(12) . . ? O5 Pr1 O4 140.16(10) . . ? O3 Pr1 O2 76.97(10) . . ? O5 Pr1 O2 69.39(10) 8_665 . ? O7 Pr1 O2 125.62(10) . . ? O2 Pr1 O2 100.27(9) 8_655 . ? O1 Pr1 O2 77.70(10) . . ? O5 Pr1 O2 154.63(10) . . ? O4 Pr1 O2 50.52(10) . . ? O3 Pr1 O6 77.14(11) . . ? O5 Pr1 O6 78.44(10) 8_665 . ? O7 Pr1 O6 74.57(11) . . ? O2 Pr1 O6 115.99(10) 8_655 . ? O1 Pr1 O6 107.79(11) . . ? O5 Pr1 O6 50.13(10) . . ? O4 Pr1 O6 140.80(12) . . ? O2 Pr1 O6 143.33(10) . . ? O3 Pr1 C1 70.84(12) . . ? O5 Pr1 C1 92.06(11) 8_665 . ? O7 Pr1 C1 99.72(12) . . ? O2 Pr1 C1 90.54(11) 8_655 . ? O1 Pr1 C1 97.16(12) . . ? O5 Pr1 C1 159.65(11) . . ? O4 Pr1 C1 24.82(11) . . ? O2 Pr1 C1 25.97(11) . . ? O6 Pr1 C1 147.99(11) . . ? O3 Pr1 C6 100.45(13) . . ? O5 Pr1 C6 93.04(11) 8_665 . ? O7 Pr1 C6 70.31(12) . . ? O2 Pr1 C6 92.19(11) 8_655 . ? O1 Pr1 C6 94.69(12) . . ? O5 Pr1 C6 25.61(11) . . ? O4 Pr1 C6 146.04(13) . . ? O2 Pr1 C6 162.30(12) . . ? O6 Pr1 C6 24.73(11) . . ? C1 Pr1 C6 168.09(14) . . ? O3 Pr1 Pr1 150.76(7) . 8_655 ? O5 Pr1 Pr1 123.85(7) 8_665 8_655 ? O7 Pr1 Pr1 73.36(7) . 8_655 ? O2 Pr1 Pr1 36.12(7) 8_655 8_655 ? O1 Pr1 Pr1 66.29(7) . 8_655 ? O5 Pr1 Pr1 33.53(6) . 8_655 ? O4 Pr1 Pr1 112.06(8) . 8_655 ? O2 Pr1 Pr1 129.59(7) . 8_655 ? O6 Pr1 Pr1 83.00(7) . 8_655 ? C1 Pr1 Pr1 126.30(8) . 8_655 ? C6 Pr1 Pr1 58.29(9) . 8_655 ? C7 O1 Pr1 137.8(3) . . ? C1 O2 Pr1 136.1(3) . 8_665 ? C1 O2 Pr1 92.7(3) . . ? Pr1 O2 Pr1 108.94(11) 8_665 . ? C7 O3 Pr1 141.2(3) 8_665 . ? C1 O4 Pr1 95.2(3) . . ? C6 O5 Pr1 148.2(3) . 8_655 ? C6 O5 Pr1 94.5(3) . . ? Pr1 O5 Pr1 111.49(11) 8_655 . ? C6 O6 Pr1 93.9(3) . . ? Pr1 O7 H7A 110.1 . . ? Pr1 O7 H7B 121.3 . . ? H7A O7 H7B 106.6 . . ? C21 N1 C25 116.8(5) . . ? O4 C1 O2 120.4(4) . . ? O4 C1 C2 121.7(4) . . ? O2 C1 C2 118.0(4) . . ? O4 C1 Pr1 60.0(2) . . ? O2 C1 Pr1 61.3(2) . . ? C2 C1 Pr1 168.7(3) . . ? O3 C7 O1 124.2(4) 8_655 . ? O3 C7 C8 117.8(4) 8_655 . ? O1 C7 C8 117.9(4) . . ? C2 C3 C4B 124.1(6) . 7_565 ? C2 C3 C4A 95.0(6) . 7_565 ? C4B C3 C4A 35.6(5) 7_565 7_565 ? C1 C2 C3 115.6(5) . . ? C1 C2 H2A 108.4 . . ? C3 C2 H2A 108.4 . . ? C1 C2 H2B 108.4 . . ? C3 C2 H2B 108.4 . . ? H2A C2 H2B 107.5 . . ? C7 C8 C9 109.6(4) . . ? C7 C8 H8A 109.8 . . ? C9 C8 H8A 109.8 . . ? C7 C8 H8B 109.8 . . ? C9 C8 H8B 109.8 . . ? H8A C8 H8B 108.2 . . ? O6 C6 O5 120.5(4) . . ? O6 C6 C5B 129.1(5) . . ? O5 C6 C5B 109.3(5) . . ? O6 C6 C5A 113.9(6) . . ? O5 C6 C5A 122.3(6) . . ? C5B C6 C5A 32.0(5) . . ? O6 C6 Pr1 61.4(2) . . ? O5 C6 Pr1 59.9(2) . . ? C5B C6 Pr1 169.2(5) . . ? C5A C6 Pr1 152.6(6) . . ? C22 C23 C24 117.6(5) . . ? C22 C23 C23 121.2(6) . 3_656 ? C24 C23 C23 121.3(5) . 3_656 ? C25 C24 C23 119.0(5) . . ? C25 C24 H24 120.5 . . ? C23 C24 H24 120.5 . . ? N1 C25 C24 123.9(5) . . ? N1 C25 H25 118.0 . . ? C24 C25 H25 118.0 . . ? C21 C22 C23 118.6(5) . . ? C21 C22 H22 120.7 . . ? C23 C22 H22 120.7 . . ? N1 C21 C22 124.0(5) . . ? N1 C21 H21 118.0 . . ? C22 C21 H21 118.0 . . ? C9 C9 C8 113.4(5) 5_565 . ? C9 C9 H9A 108.9 5_565 . ? C8 C9 H9A 108.9 . . ? C9 C9 H9B 108.9 5_565 . ? C8 C9 H9B 108.9 . . ? H9A C9 H9B 107.7 . . ? C4A C4B C5A 74.5(10) . . ? C4A C4B C3 75.0(9) . 7_566 ? C5A C4B C3 114.9(8) . 7_566 ? C4A C4B C5B 44.5(8) . . ? C5A C4B C5B 31.3(5) . . ? C3 C4B C5B 105.6(7) 7_566 . ? C4B C4A C5B 99.4(12) . . ? C4B C4A C5A 67.3(9) . . ? C5B C4A C5A 33.6(6) . . ? C4B C4A C3 69.4(10) . 7_566 ? C5B C4A C3 132.5(11) . 7_566 ? C5A C4A C3 108.6(9) . 7_566 ? C5B C5A C4B 85.8(13) . . ? C5B C5A C4A 49.1(11) . . ? C4B C5A C4A 38.1(6) . . ? C5B C5A C6 73.8(11) . . ? C4B C5A C6 117.5(9) . . ? C4A C5A C6 107.4(9) . . ? C5A C5B C4A 97.3(14) . . ? C5A C5B C6 74.2(11) . . ? C4A C5B C6 132.0(11) . . ? C5A C5B C4B 62.9(10) . . ? C4A C5B C4B 36.1(7) . . ? C6 C5B C4B 107.9(7) . . ? loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_site_symmetry_2 _geom_bond_publ_flag Pr1 O3 2.415(3) . ? Pr1 O5 2.451(3) 8_665 ? Pr1 O7 2.489(3) . ? Pr1 O2 2.500(3) 8_655 ? Pr1 O1 2.506(3) . ? Pr1 O5 2.544(3) . ? Pr1 O4 2.549(3) . ? Pr1 O2 2.573(3) . ? Pr1 O6 2.580(3) . ? Pr1 C1 2.930(4) . ? Pr1 C6 2.932(5) . ? Pr1 Pr1 4.1287(2) 8_655 ? O1 C7 1.265(5) . ? O2 C1 1.285(5) . ? O2 Pr1 2.500(3) 8_665 ? O3 C7 1.239(5) 8_665 ? O4 C1 1.235(5) . ? O5 C6 1.271(5) . ? O5 Pr1 2.451(3) 8_655 ? O6 C6 1.229(6) . ? O7 H7A 0.8370 . ? O7 H7B 0.9644 . ? N1 C21 1.321(7) . ? N1 C25 1.327(7) . ? C1 C2 1.502(6) . ? C7 O3 1.239(5) 8_655 ? C7 C8 1.508(6) . ? C3 C2 1.531(8) . ? C3 C4B 1.560(10) 7_565 ? C3 C4A 1.610(14) 7_565 ? C2 H2A 0.9700 . ? C2 H2B 0.9700 . ? C8 C9 1.515(7) . ? C8 H8A 0.9700 . ? C8 H8B 0.9700 . ? C6 C5B 1.530(11) . ? C6 C5A 1.533(11) . ? C23 C22 1.383(7) . ? C23 C24 1.387(7) . ? C23 C23 1.495(9) 3_656 ? C24 C25 1.370(7) . ? C24 H24 0.9300 . ? C25 H25 0.9300 . ? C22 C21 1.382(7) . ? C22 H22 0.9300 . ? C21 H21 0.9300 . ? C9 C9 1.517(8) 5_565 ? C9 H9A 0.9700 . ? C9 H9B 0.9700 . ? C4B C4A 0.969(14) . ? C4B C5A 1.448(12) . ? C4B C3 1.560(10) 7_566 ? C4B C5B 1.622(13) . ? C4A C5B 1.152(13) . ? C4A C5A 1.513(16) . ? C4A C3 1.610(14) 7_566 ? C5A C5B 0.844(12) . ?