Copper complexes of 2,6-bis(iminomethyl)pyridine derivatives and of 1,3-bis(pyridin-2-yl)pyrazole. Effects of ligand bulk and conformational strain on the ground state of a six-co-ordinate copper(II) ion
Holland, Joanne M.; Liu, Xiaoming; Zhao, Jing P.; Mabbs, Frank E.; Kilner, Colin A.; Thornton-Pett, Mark; Halcrow, Malcolm A.; Journal of the Chemical Society, Dalton Transactions  (2000) 3316–; doi:10.1039/b005105p

data_7010019
_publ_section_title
;
 Copper complexes of 2,6-bis(iminomethyl)pyridine derivatives and of
 1,3-bis(pyridin-2-yl)pyrazole. Effects of ligand bulk and
 conformational strain on the ground state of a six-co-ordinate
 copper(II) ion
;
_journal_issue                   19
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              3316
_journal_paper_doi               10.1039/b005105p
_journal_year                    2000
_chemical_formula_moiety         'C26 H20 Cu N8, 2Cl O4'
_chemical_formula_sum            'C26 H20 Cl2 Cu N8 O8'
_chemical_formula_weight         706.94
_chemical_name_systematic
; 
Bis-[1,3-di{pyridin-2-yl}pyrazole]copper(II) diperchlorate
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 92.334(14)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.7526(19)
_cell_length_b                   8.7892(19)
_cell_length_c                   19.381(5)
_cell_measurement_temperature    293(2)
_cell_volume                     1489.7(6)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1996)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1996)'
_computing_molecular_graphics    'ORTEX (McArdle, 1995)'
_computing_publication_material  'local program'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.867
_diffrn_measured_fraction_theta_max 0.867
_diffrn_measurement_device_type
'Nonius KappaCCD area detector diffractometer'
_diffrn_measurement_method
;
   Detector set at 30mm from sample with different 2theta offsets 
   1 degree phi exposures for chi=0 degree settings
   1 degree omega exposures for chi=90 degree settings
;
_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  0.0605
_diffrn_reflns_av_sigmaI/netI    0.0827
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            7778
_diffrn_reflns_theta_full        26.22
_diffrn_reflns_theta_max         26.22
_diffrn_reflns_theta_min         1.05
_exptl_absorpt_coefficient_mu    0.975
_exptl_absorpt_correction_T_max  0.7787
_exptl_absorpt_correction_T_min  0.6848
_exptl_absorpt_process_details
;
 Using multiple and symmetry-related data measurements via the program SORTAV
 See R.H. Blessing, Acta Cryst (1995), A51, 33-38 
;
_exptl_crystal_colour            Green
_exptl_crystal_density_diffrn    1.576
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lath
_exptl_crystal_F_000             718
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.738
_refine_diff_density_min         -0.618
_refine_diff_density_rms         0.152
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.04(4)
_refine_ls_extinction_coef       0.021(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     473
_refine_ls_number_reflns         4711
_refine_ls_number_restraints     113
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.1249
_refine_ls_R_factor_gt           0.0892
_refine_ls_shift/su_max          0.029
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1379P)^2^+1.1265P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2276
_refine_ls_wR_factor_ref         0.2601
_reflns_number_gt                3077
_reflns_number_total             4711
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b005105p.txt
_cod_data_source_block           mh31
_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      'P 21'
_cod_database_code               7010019