Synthesis, crystal structures and properties of four topological structures based on 2,3,5,6-tetramethyl-1,4-benzenedicarboxylate acid and bipyridine ligands
He, Haiyan; Dou, Jianmin; Li, Dacheng; Ma, Huiqing; Sun, Daofeng; CrystEngComm 13 (2011) 1509–; doi:10.1039/c0ce00047g

data_7205111
_publ_section_title
;
 Synthesis, crystal structures and properties of four topological
 structures based on 2,3,5,6-tetramethyl-1,4-benzenedicarboxylate acid
 and bipyridine ligands
;
_journal_issue                   5
_journal_name_full               CrystEngComm
_journal_page_first              1509
_journal_paper_doi               10.1039/c0ce00047g
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C22 H20 N2 Ni O4'
_chemical_formula_weight         435.11
_chemical_name_systematic
;
?
;
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 109.7910(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.1443(10)
_cell_length_b                   10.5695(7)
_cell_length_c                   13.5488(9)
_cell_measurement_reflns_used    2631
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.1
_cell_measurement_theta_min      2.5
_cell_volume                     1905.9(2)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 2007)'
_computing_data_reduction        'SAINT+ (Bruker, 2007)'
_computing_molecular_graphics    'SHELXTL (Bruker, 2007)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.972
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'Bruker APEX II CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0199
_diffrn_reflns_av_sigmaI/netI    0.0270
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5501
_diffrn_reflns_theta_full        27.6
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         2.46
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.050
_exptl_absorpt_correction_T_max  0.9592
_exptl_absorpt_correction_T_min  0.8669
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.516
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.333
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     134
_refine_ls_number_reflns         2148
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0356
_refine_ls_R_factor_gt           0.0305
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0375P)^2^+2.3269P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0798
_refine_ls_wR_factor_ref         0.0830
_reflns_number_gt                1930
_reflns_number_total             2148
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            C0CE00047G.TXT
_cod_data_source_block           3
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7205111