Complexes of 2,6-bis[N-(2'-pyridylmethyl)carbamyl]pyridine: formation of mononuclear complexes, and self-assembly of double helical dinuclear and tetranuclear copper(II) and trinuclear nickel(II) complexes.
Alcock, Nathaniel W.; Clarkson, Guy; Glover, Peter B.; Lawrance, Geoffrey A.; Moore, Peter; Napitupulu, Mery; Dalton transactions (Cambridge, England : 2003)  (2005) 518–527; doi:10.1039/b414251a

data_7007961
_publ_section_title
;
 Complexes of 2,6-bis[N-(2'-pyridylmethyl)carbamyl]pyridine: formation
 of mononuclear complexes, and self-assembly of double helical
 dinuclear and tetranuclear copper(II) and trinuclear nickel(II)
 complexes.
;
_journal_issue                   3
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              518
_journal_page_last               527
_journal_paper_doi               10.1039/b414251a
_journal_year                    2005
_chemical_formula_sum            'C56 H55 Cu4 N12 O20'
_chemical_formula_weight         1470.28
_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                 99.4380(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   20.9193(6)
_cell_length_b                   22.0981(7)
_cell_length_c                   13.0496(4)
_cell_measurement_reflns_used    4508
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      15
_cell_measurement_theta_min      3
_cell_volume                     5950.9(3)
_computing_cell_refinement       'SAINT (Siemens, 1995)'
_computing_data_collection       'SMART (Siemens, 1994)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      180(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Siemens SMART diffractometer'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0690
_diffrn_reflns_av_sigmaI/netI    0.0885
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            15270
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.84
_diffrn_standards_decay_%        nil
_exptl_absorpt_coefficient_mu    1.498
_exptl_absorpt_correction_T_max  0.89
_exptl_absorpt_correction_T_min  0.78
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.641
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             3004
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.042
_refine_diff_density_min         -0.599
_refine_diff_density_rms         0.109
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.103
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     432
_refine_ls_number_reflns         5227
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.1031
_refine_ls_R_factor_gt           0.0537
_refine_ls_shift/su_max          0.090
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0530P)^2^+10.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1140
_refine_ls_wR_factor_ref         0.1328
_reflns_number_gt                3409
_reflns_number_total             5227
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b414251a.txt
_cod_data_source_block           cupy3b
_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      C2/c
_cod_database_code               7007961