A series of alkaline earth metal coordination polymers constructed from two newly designed imidazole-based dicarboxylate ligands containing pyridinylmethyl group
Cai, Songliang; He, Zi-Hao; Wu, Wan-Hua; Liu, Fang-Xiu; Huang, Xiao-Ling; Zheng, Shengrun; Fan, Jun; Zhang, Wei-Guang; CrystEngComm  (2017) –; doi:10.1039/C7CE00568G

data_7228180
_publ_section_title
;
 A series of alkaline earth metal coordination polymers constructed from
 two newly designed imidazole-based dicarboxylate ligands containing
 pyridinylmethyl group
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/C7CE00568G
_journal_year                    2017
_chemical_formula_moiety         'C22 H18 Ca2 N6 O10'
_chemical_formula_sum            'C22 H18 Ca2 N6 O10'
_chemical_formula_weight         606.58
_space_group_crystal_system      orthorhombic
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-03-23 deposited with the CCDC.
2017-05-03 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.991(5)
_cell_length_b                   6.826(3)
_cell_length_c                   25.261(9)
_cell_measurement_reflns_used    1300
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      22.29
_cell_measurement_theta_min      2.83
_cell_volume                     2584.9(17)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1089
_diffrn_reflns_av_unetI/netI     0.1062
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            11981
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        24.993
_diffrn_reflns_theta_max         24.993
_diffrn_reflns_theta_min         1.612
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.509
_exptl_absorpt_correction_T_max  0.9415
_exptl_absorpt_correction_T_min  0.8920
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            COLORLESS
_exptl_crystal_density_diffrn    1.559
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.230
_exptl_crystal_size_mid          0.180
_exptl_crystal_size_min          0.120
_refine_diff_density_max         1.349
_refine_diff_density_min         -0.763
_refine_diff_density_rms         0.188
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.22(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     338
_refine_ls_number_reflns         3422
_refine_ls_number_restraints     415
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.1605
_refine_ls_R_factor_gt           0.1244
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0080P)^2^+68.2999P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2848
_refine_ls_wR_factor_ref         0.3064
_reflns_Friedel_coverage         0.949
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                2324
_reflns_number_total             3422
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ce00568g2.cif
_cod_data_source_block           3
_cod_original_cell_volume        2585.0(16)
_cod_database_code               7228180
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.892
_shelx_estimated_absorpt_t_max   0.941
_shelx_res_checksum              46834