# Electronic Supplementary Material (ESI) for CrystEngComm # This journal is © The Royal Society of Chemistry 2013 ####################################################################### # # Cambridge Crystallographic Data Centre # CCDC # ####################################################################### # # This CIF contains data from an original supplementary publication # deposited with the CCDC, and may include chemical, crystal, # experimental, refinement, atomic coordinates, # anisotropic displacement parameters and molecular geometry data, # as required by the journal to which it was submitted. # # This CIF is provided on the understanding that it is used for bona # fide research purposes only. It may contain copyright material # of the CCDC or of third parties, and may not be copied or further # disseminated in any form, whether machine-readable or not, # except for the purpose of generating routine backup copies # on your local computer system. # # For further information on the CCDC, data deposition and # data retrieval see: # www.ccdc.cam.ac.uk # # Bona fide researchers may freely download Mercury and enCIFer # from this site to visualise CIF-encoded structures and # to carry out CIF format checking respectively. # data_CdSO4TPymT _audit_creation_method SHELXL-97 _chemical_name_systematic ; ? ; _chemical_name_common ? _chemical_melting_point ? _chemical_formula_moiety 'C15 H21 Cd2 N9 O14 S2, H2 O' _chemical_formula_sum 'C15 H23 Cd2 N9 O15 S2' _chemical_formula_weight 858.34 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' S S 0.1246 0.1234 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' Cd Cd -0.8075 1.2024 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' _symmetry_cell_setting Orthorhombic _symmetry_space_group_name_H-M Pbcn _symmetry_space_group_name_Hall '-P 2n 2ab' 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' _cell_length_a 23.8424(5) _cell_length_b 14.7858(3) _cell_length_c 7.6296(2) _cell_angle_alpha 90.00 _cell_angle_beta 90.00 _cell_angle_gamma 90.00 _cell_volume 2689.66(11) _cell_formula_units_Z 4 _cell_measurement_temperature 200(2) _cell_measurement_reflns_used 9868 _cell_measurement_theta_min 2.76 _cell_measurement_theta_max 28.31 _exptl_crystal_description block _exptl_crystal_colour orange _exptl_crystal_size_max 0.28 _exptl_crystal_size_mid 0.09 _exptl_crystal_size_min 0.07 _exptl_crystal_density_meas n/a _exptl_crystal_density_diffrn 2.120 _exptl_crystal_density_method 'not measured' _exptl_crystal_F_000 1696 _exptl_absorpt_coefficient_mu 1.825 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_correction_T_min 0.6299 _exptl_absorpt_correction_T_max 0.8798 _exptl_absorpt_process_details 'SADABS, Bruker (2003)' _exptl_special_details ; Data collection is performed with three batch runs at phi = 0.00 deg (650 frames), at phi = 120.00 deg (650 frames), and at phi = 240.00 deg (650 frames). Frame width = 0.30 deg in omega. Data is merged, corrected for decay (if any), and treated with multi-scan absorption corrections (if required). All symmetry-equivalent reflections are merged for centrosymmetric data. Friedel pairs are not merged for noncentrosymmetric data. ; _diffrn_ambient_temperature 200(2) _diffrn_radiation_wavelength 0.71073 _diffrn_radiation_type MoK\a _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_monochromator graphite _diffrn_measurement_device_type 'Bruker APEX-II CCD' _diffrn_measurement_method '\f and \w scans' _diffrn_detector_area_resol_mean ? _diffrn_reflns_number 31679 _diffrn_reflns_av_R_equivalents 0.0257 _diffrn_reflns_av_sigmaI/netI 0.0132 _diffrn_reflns_limit_h_min -31 _diffrn_reflns_limit_h_max 31 _diffrn_reflns_limit_k_min -19 _diffrn_reflns_limit_k_max 19 _diffrn_reflns_limit_l_min -10 _diffrn_reflns_limit_l_max 10 _diffrn_reflns_theta_min 1.71 _diffrn_reflns_theta_max 28.31 _reflns_number_total 3302 _reflns_number_gt 2972 _reflns_threshold_expression >2sigma(I) _computing_data_collection 'APEX II, Bruker (2009)' _computing_cell_refinement 'APEX II, Bruker (2009)' _computing_data_reduction 'XPREP, Bruker (2009)' _computing_structure_solution 'SHELXS-97 (Sheldrick, 2008)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 2008)' _computing_molecular_graphics 'SHELXTL, Bruker (2004)' _computing_publication_material 'SHELXTL, Bruker (2004)' _refine_special_details ; Refinement of F^2^ against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F^2^, conventional R-factors R are based on F, with F set to zero for negative F^2^. The threshold expression of F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F^2^ are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. ; _refine_ls_structure_factor_coef Fsqd _refine_ls_matrix_type full _refine_ls_weighting_scheme calc _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0352P)^2^+2.6304P] where P=(Fo^2^+2Fc^2^)/3' _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _atom_sites_solution_hydrogens geom _refine_ls_hydrogen_treatment constr _refine_ls_extinction_method none _refine_ls_extinction_coef ? _refine_ls_number_reflns 3302 _refine_ls_number_parameters 197 _refine_ls_number_restraints 1 _refine_ls_R_factor_all 0.0266 _refine_ls_R_factor_gt 0.0219 _refine_ls_wR_factor_ref 0.0594 _refine_ls_wR_factor_gt 0.0569 _refine_ls_goodness_of_fit_ref 1.009 _refine_ls_restrained_S_all 1.009 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_mean 0.000 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 Cd1 Cd 0.376228(6) 0.701409(10) 0.067014(19) 0.01678(6) Uani 1 1 d . . . S1 S 0.33879(2) 0.67078(4) 0.47884(6) 0.01671(10) Uani 1 1 d . . . O1 O 0.32589(7) 0.58636(11) 0.57455(19) 0.0246(3) Uani 1 1 d . . . O2 O 0.30325(7) 0.74394(11) 0.5497(2) 0.0247(3) Uani 1 1 d . . . O3 O 0.39825(7) 0.69409(13) 0.4999(2) 0.0325(4) Uani 1 1 d . . . O4 O 0.32512(6) 0.65686(11) 0.29173(19) 0.0235(3) Uani 1 1 d . . . O5 O 0.42914(7) 0.73581(12) -0.1747(2) 0.0278(3) Uani 1 1 d . . . H5B H 0.4165 0.7194 -0.2892 0.042 Uiso 1 1 d R . . H5C H 0.4572 0.7863 -0.1820 0.042 Uiso 1 1 d R . . O6 O 0.30010(8) 0.74705(16) -0.0933(2) 0.0405(5) Uani 1 1 d . . . H6A H 0.2988 0.7435 -0.2182 0.061 Uiso 1 1 d R . . H6B H 0.2613 0.7415 -0.0430 0.061 Uiso 1 1 d R . . O7 O 0.35809(8) 0.56861(12) -0.0818(2) 0.0329(4) Uani 1 1 d . . . H7A H 0.3438 0.5156 -0.0258 0.049 Uiso 1 1 d R . . H7B H 0.3437 0.5726 -0.2053 0.049 Uiso 1 1 d R . . O8 O 0.5000 0.87648(16) -0.2500 0.0444(7) Uani 1 2 d SD . . H8B H 0.5298 0.9205 -0.2177 0.067 Uiso 1 1 d RD . . N1 N 0.45408(7) 0.78701(11) 0.1930(2) 0.0158(3) Uani 1 1 d . . . N2 N 0.5000 0.92593(17) 0.2500 0.0227(5) Uani 1 2 d S . . N3 N 0.45605(7) 0.60459(11) 0.1751(2) 0.0164(3) Uani 1 1 d . . . N4 N 0.35720(8) 0.87461(13) 0.1444(3) 0.0313(5) Uani 1 1 d . . . N5 N 0.40452(8) 1.01600(13) 0.1591(3) 0.0332(5) Uani 1 1 d . . . C1 C 0.45533(8) 0.87718(13) 0.2030(3) 0.0181(4) Uani 1 1 d . . . C2 C 0.40219(9) 0.92598(14) 0.1643(3) 0.0226(4) Uani 1 1 d . . . C3 C 0.30840(11) 0.91865(19) 0.1264(5) 0.0435(7) Uani 1 1 d . . . H3A H 0.2748 0.8847 0.1150 0.052 Uiso 1 1 calc R . . C4 C 0.30553(11) 1.01140(19) 0.1239(5) 0.0474(8) Uani 1 1 d . . . H4A H 0.2706 1.0420 0.1141 0.057 Uiso 1 1 calc R . . C5 C 0.35515(11) 1.05826(17) 0.1361(5) 0.0434(7) Uani 1 1 d . . . H5A H 0.3545 1.1224 0.1281 0.052 Uiso 1 1 calc R . . C6 C 0.5000 0.74521(18) 0.2500 0.0137(5) Uani 1 2 d S . . C7 C 0.5000 0.64420(18) 0.2500 0.0139(5) Uani 1 2 d S . . C8 C 0.45655(8) 0.51390(13) 0.1752(3) 0.0191(4) Uani 1 1 d . . . H8A H 0.4263 0.4822 0.1225 0.023 Uiso 1 1 calc R . . C9 C 0.5000 0.4653(2) 0.2500 0.0209(6) Uani 1 2 d S . . H9A H 0.5000 0.4010 0.2500 0.025 Uiso 1 2 calc SR . . 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 Cd1 0.01443(9) 0.01987(9) 0.01603(9) 0.00014(5) -0.00048(5) -0.00212(5) S1 0.0159(2) 0.0217(2) 0.0125(2) -0.00076(18) 0.00049(17) 0.00065(18) O1 0.0342(9) 0.0209(8) 0.0188(8) 0.0026(6) 0.0016(6) 0.0038(6) O2 0.0284(8) 0.0224(8) 0.0231(8) -0.0036(6) -0.0016(6) 0.0059(6) O3 0.0162(8) 0.0589(12) 0.0223(9) -0.0068(8) 0.0025(7) -0.0060(7) O4 0.0234(7) 0.0338(9) 0.0134(7) -0.0005(6) 0.0007(6) -0.0049(6) O5 0.0274(8) 0.0365(9) 0.0196(7) -0.0008(7) 0.0031(6) -0.0147(7) O6 0.0262(9) 0.0733(14) 0.0220(9) -0.0040(9) -0.0014(7) 0.0193(9) O7 0.0542(11) 0.0231(8) 0.0214(8) 0.0023(6) -0.0098(7) -0.0101(8) O8 0.0252(12) 0.0151(11) 0.093(2) 0.000 -0.0074(13) 0.000 N1 0.0161(8) 0.0134(8) 0.0180(8) 0.0001(6) -0.0023(6) -0.0003(6) N2 0.0181(11) 0.0136(11) 0.0364(15) 0.000 -0.0067(10) 0.000 N3 0.0162(7) 0.0145(8) 0.0184(8) -0.0012(6) 0.0009(6) -0.0013(6) N4 0.0180(8) 0.0221(10) 0.0540(14) 0.0009(9) -0.0119(9) 0.0010(7) N5 0.0246(10) 0.0158(9) 0.0591(14) 0.0019(9) -0.0119(9) 0.0039(7) C1 0.0182(9) 0.0138(9) 0.0223(10) 0.0001(7) -0.0030(8) -0.0005(7) C2 0.0196(10) 0.0150(9) 0.0333(12) -0.0015(8) -0.0064(8) 0.0009(8) C3 0.0203(11) 0.0316(14) 0.079(2) -0.0059(14) -0.0154(13) 0.0028(10) C4 0.0262(12) 0.0353(15) 0.081(2) -0.0067(15) -0.0185(14) 0.0129(11) C5 0.0320(13) 0.0196(12) 0.079(2) -0.0027(13) -0.0174(14) 0.0091(10) C6 0.0147(12) 0.0120(12) 0.0145(12) 0.000 0.0012(10) 0.000 C7 0.0161(12) 0.0112(12) 0.0145(12) 0.000 0.0024(10) 0.000 C8 0.0193(9) 0.0158(10) 0.0224(10) -0.0022(8) 0.0014(8) -0.0032(7) C9 0.0250(14) 0.0129(13) 0.0248(15) 0.000 0.0034(12) 0.000 _geom_special_details ; All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes. ; 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 Cd1 O4 2.2041(15) . ? Cd1 O5 2.2915(15) . ? Cd1 O6 2.2904(17) . ? Cd1 O7 2.3092(17) . ? Cd1 N1 2.4438(16) . ? Cd1 N3 2.5201(17) . ? Cd1 N4 2.667(2) . ? S1 O3 1.4679(17) . ? S1 O2 1.4765(16) . ? S1 O4 1.4787(15) . ? S1 O1 1.4784(16) . ? N1 C6 1.330(2) . ? N1 C1 1.336(2) . ? N2 C1 1.335(2) . ? N2 C1 1.335(2) 3_655 ? N3 C8 1.341(3) . ? N3 C7 1.329(2) . ? N4 C2 1.323(3) . ? N4 C3 1.340(3) . ? N5 C2 1.333(3) . ? N5 C5 1.344(3) . ? C1 C2 1.488(3) . ? C3 C4 1.373(4) . ? C4 C5 1.374(4) . ? C6 N1 1.330(2) 3_655 ? C6 C7 1.494(4) . ? C7 N3 1.329(2) 3_655 ? C8 C9 1.384(3) . ? C9 C8 1.384(3) 3_655 ? 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 O4 Cd1 O5 175.33(6) . . ? O4 Cd1 O6 93.74(6) . . ? O5 Cd1 O6 86.63(6) . . ? O4 Cd1 O7 91.43(6) . . ? O5 Cd1 O7 84.03(6) . . ? O6 Cd1 O7 80.76(7) . . ? O4 Cd1 N1 105.59(6) . . ? O5 Cd1 N1 77.50(6) . . ? O6 Cd1 N1 131.26(7) . . ? O7 Cd1 N1 140.91(6) . . ? O4 Cd1 N3 89.61(6) . . ? O5 Cd1 N3 88.49(6) . . ? O6 Cd1 N3 160.15(7) . . ? O7 Cd1 N3 79.59(6) . . ? N1 Cd1 N3 65.91(6) . . ? O4 Cd1 N4 91.19(7) . . ? O5 Cd1 N4 93.36(7) . . ? O6 Cd1 N4 72.57(7) . . ? O7 Cd1 N4 153.32(6) . . ? N1 Cd1 N4 62.92(6) . . ? N3 Cd1 N4 126.98(6) . . ? O3 S1 O2 110.01(10) . . ? O3 S1 O4 110.57(9) . . ? O2 S1 O4 109.19(9) . . ? O3 S1 O1 110.18(10) . . ? O2 S1 O1 108.57(9) . . ? O4 S1 O1 108.27(9) . . ? S1 O4 Cd1 125.99(9) . . ? C6 N1 C1 115.26(18) . . ? C6 N1 Cd1 120.87(14) . . ? C1 N1 Cd1 123.80(13) . . ? C1 N2 C1 114.6(2) . 3_655 ? C8 N3 C7 115.66(18) . . ? C8 N3 Cd1 125.10(13) . . ? C7 N3 Cd1 119.06(14) . . ? C2 N4 C3 115.9(2) . . ? C2 N4 Cd1 116.02(15) . . ? C3 N4 Cd1 126.26(16) . . ? C2 N5 C5 115.6(2) . . ? N2 C1 N1 124.89(19) . . ? N2 C1 C2 118.09(18) . . ? N1 C1 C2 116.98(17) . . ? N4 C2 N5 127.1(2) . . ? N4 C2 C1 115.78(18) . . ? N5 C2 C1 117.05(18) . . ? N4 C3 C4 122.0(2) . . ? C5 C4 C3 117.4(2) . . ? N5 C5 C4 121.9(2) . . ? N1 C6 N1 124.6(2) 3_655 . ? N1 C6 C7 117.69(12) 3_655 . ? N1 C6 C7 117.69(12) . . ? N3 C7 N3 127.7(2) 3_655 . ? N3 C7 C6 116.13(12) 3_655 . ? N3 C7 C6 116.13(12) . . ? N3 C8 C9 121.7(2) . . ? C8 C9 C8 117.4(3) 3_655 . ? 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_site_symmetry_1 _geom_torsion_site_symmetry_2 _geom_torsion_site_symmetry_3 _geom_torsion_site_symmetry_4 _geom_torsion_publ_flag O3 S1 O4 Cd1 -16.79(15) . . . . ? O2 S1 O4 Cd1 104.38(12) . . . . ? O1 S1 O4 Cd1 -137.59(11) . . . . ? O6 Cd1 O4 S1 -139.15(12) . . . . ? O7 Cd1 O4 S1 140.01(12) . . . . ? N1 Cd1 O4 S1 -4.37(13) . . . . ? N3 Cd1 O4 S1 60.43(12) . . . . ? N4 Cd1 O4 S1 -66.54(12) . . . . ? O4 Cd1 N1 C6 84.73(12) . . . . ? O5 Cd1 N1 C6 -91.65(12) . . . . ? O6 Cd1 N1 C6 -165.71(10) . . . . ? O7 Cd1 N1 C6 -27.87(17) . . . . ? N3 Cd1 N1 C6 2.35(11) . . . . ? N4 Cd1 N1 C6 167.94(15) . . . . ? O4 Cd1 N1 C1 -98.39(17) . . . . ? O5 Cd1 N1 C1 85.23(17) . . . . ? O6 Cd1 N1 C1 11.2(2) . . . . ? O7 Cd1 N1 C1 149.01(15) . . . . ? N3 Cd1 N1 C1 179.22(18) . . . . ? N4 Cd1 N1 C1 -15.19(16) . . . . ? O4 Cd1 N3 C8 69.22(17) . . . . ? O5 Cd1 N3 C8 -106.51(17) . . . . ? O6 Cd1 N3 C8 -30.8(3) . . . . ? O7 Cd1 N3 C8 -22.31(16) . . . . ? N1 Cd1 N3 C8 176.52(18) . . . . ? N4 Cd1 N3 C8 160.41(16) . . . . ? O4 Cd1 N3 C7 -105.69(11) . . . . ? O5 Cd1 N3 C7 78.58(11) . . . . ? O6 Cd1 N3 C7 154.33(16) . . . . ? O7 Cd1 N3 C7 162.78(12) . . . . ? N1 Cd1 N3 C7 1.61(10) . . . . ? N4 Cd1 N3 C7 -14.50(15) . . . . ? O4 Cd1 N4 C2 125.48(18) . . . . ? O5 Cd1 N4 C2 -55.58(19) . . . . ? O6 Cd1 N4 C2 -141.0(2) . . . . ? O7 Cd1 N4 C2 -138.97(17) . . . . ? N1 Cd1 N4 C2 18.55(17) . . . . ? N3 Cd1 N4 C2 35.1(2) . . . . ? O4 Cd1 N4 C3 -70.6(3) . . . . ? O5 Cd1 N4 C3 108.3(3) . . . . ? O6 Cd1 N4 C3 22.9(3) . . . . ? O7 Cd1 N4 C3 24.9(3) . . . . ? N1 Cd1 N4 C3 -177.6(3) . . . . ? N3 Cd1 N4 C3 -161.0(2) . . . . ? C1 N2 C1 N1 -3.28(15) 3_655 . . . ? C1 N2 C1 C2 174.6(2) 3_655 . . . ? C6 N1 C1 N2 6.1(3) . . . . ? Cd1 N1 C1 N2 -170.89(12) . . . . ? C6 N1 C1 C2 -171.74(16) . . . . ? Cd1 N1 C1 C2 11.2(3) . . . . ? C3 N4 C2 N5 -3.8(4) . . . . ? Cd1 N4 C2 N5 161.8(2) . . . . ? C3 N4 C2 C1 173.8(3) . . . . ? Cd1 N4 C2 C1 -20.6(3) . . . . ? C5 N5 C2 N4 2.0(4) . . . . ? C5 N5 C2 C1 -175.5(2) . . . . ? N2 C1 C2 N4 -170.2(2) . . . . ? N1 C1 C2 N4 7.9(3) . . . . ? N2 C1 C2 N5 7.7(3) . . . . ? N1 C1 C2 N5 -174.3(2) . . . . ? C2 N4 C3 C4 1.7(5) . . . . ? Cd1 N4 C3 C4 -162.2(3) . . . . ? N4 C3 C4 C5 1.7(6) . . . . ? C2 N5 C5 C4 1.8(5) . . . . ? C3 C4 C5 N5 -3.5(6) . . . . ? C1 N1 C6 N1 -2.84(13) . . . 3_655 ? Cd1 N1 C6 N1 174.30(13) . . . 3_655 ? C1 N1 C6 C7 177.16(13) . . . . ? Cd1 N1 C6 C7 -5.71(13) . . . . ? C8 N3 C7 N3 -0.25(13) . . . 3_655 ? Cd1 N3 C7 N3 175.13(12) . . . 3_655 ? C8 N3 C7 C6 179.75(13) . . . . ? Cd1 N3 C7 C6 -4.87(12) . . . . ? N1 C6 C7 N3 6.94(11) 3_655 . . 3_655 ? N1 C6 C7 N3 -173.05(11) . . . 3_655 ? N1 C6 C7 N3 -173.06(11) 3_655 . . . ? N1 C6 C7 N3 6.94(11) . . . . ? C7 N3 C8 C9 0.5(3) . . . . ? Cd1 N3 C8 C9 -174.57(10) . . . . ? N3 C8 C9 C8 -0.26(14) . . . 3_655 ? _diffrn_measured_fraction_theta_max 0.985 _diffrn_reflns_theta_full 28.31 _diffrn_measured_fraction_theta_full 0.985 _refine_diff_density_max 0.570 _refine_diff_density_min -0.642 _refine_diff_density_rms 0.077 _database_code_depnum_ccdc_archive 'CCDC 955952'