A new 2-carboxylate-substituted 4,4'-bipyridine ligand: coordination chemistry of 4,4'-bipyridine-2-carboxylic acid and its synthetic intermediate 2-methyl-4,4'-bipyridine.
Chen, Chun-Long; Ellsworth, Joseph M.; Goforth, Andrea M.; Smith, Mark D.; Su, Cheng-Yong; Zur Loye, Hans-Conrad; Dalton transactions (Cambridge, England : 2003)  (2006) 5278–5286; doi:10.1039/b606280f

data_7007490
_publ_section_title
;
 A new 2-carboxylate-substituted 4,4'-bipyridine ligand: coordination
 chemistry of 4,4'-bipyridine-2-carboxylic acid and its synthetic
 intermediate 2-methyl-4,4'-bipyridine.
;
_journal_issue                   44
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5278
_journal_page_last               5286
_journal_paper_doi               10.1039/b606280f
_journal_year                    2006
_chemical_formula_moiety         'C22 H14 Cu Hg I2 N4 O4'
_chemical_formula_sum            'C22 H14 Cu Hg I2 N4 O4'
_chemical_formula_weight         916.30
_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                 108.2680(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   30.3812(18)
_cell_length_b                   5.0478(3)
_cell_length_c                   16.3401(9)
_cell_measurement_reflns_used    4397
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      26.316
_cell_measurement_theta_min      2.562
_cell_volume                     2379.6(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(1)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0364
_diffrn_reflns_av_sigmaI/netI    0.0261
_diffrn_reflns_limit_h_max       37
_diffrn_reflns_limit_h_min       -37
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            12484
_diffrn_reflns_theta_full        26.39
_diffrn_reflns_theta_max         26.39
_diffrn_reflns_theta_min         1.41
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    9.970
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6390
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS, Bruker, 2001)'
_exptl_crystal_colour            'dark blue'
_exptl_crystal_density_diffrn    2.558
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       bar
_exptl_crystal_F_000             1684
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.949
_refine_diff_density_min         -1.014
_refine_diff_density_rms         0.160
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     156
_refine_ls_number_reflns         2444
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.083
_refine_ls_R_factor_all          0.0353
_refine_ls_R_factor_gt           0.0310
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0354P)^2^+24.9787P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0782
_refine_ls_wR_factor_ref         0.0806
_reflns_number_gt                2223
_reflns_number_total             2444
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b606280f.txt
_cod_data_source_block           je1095ms
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7007490