Control of molecular architecture by the degree of deprotonation: self-assembled di- and tetranuclear copper(II) complexes of N,N'-bis(2-pyridylmethyl)pyrazine-2,3-dicarboxamide
Hausmann, Julia; Jameson, Geoffrey B.; Brooker, Sally; Chemical Communications (Cambridge, United Kingdom)  (2003) 2992–2993; doi:10.1039/b308263f

data_7103901
_publ_section_title
;
 Control of molecular architecture by the degree of deprotonation:
 self-assembled di- and tetranuclear copper(II) complexes of
 N,N'-bis(2-pyridylmethyl)pyrazine-2,3-dicarboxamide
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   24
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              2992
_journal_page_last               2993
_journal_paper_doi               10.1039/b308263f
_journal_year                    2003
_chemical_formula_sum            'C79 H60 B4 Cu4 F16 N27.5 O8'
_chemical_formula_weight         2123.95
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 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                 90.156(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.4502(5)
_cell_length_b                   21.4616(5)
_cell_length_c                   19.9220(5)
_cell_measurement_reflns_used    17369
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      26.65
_cell_measurement_theta_min      1.67
_cell_volume                     9171.2(4)
_computing_molecular_graphics    'XP: SHELXTL 5.1 (Bruker AXS Inc., 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'Bruker SMART area detector'
_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  0.0741
_diffrn_reflns_av_sigmaI/netI    0.1489
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            21082
_diffrn_reflns_theta_full        26.48
_diffrn_reflns_theta_max         26.48
_diffrn_reflns_theta_min         2.04
_exptl_absorpt_coefficient_mu    1.017
_exptl_absorpt_correction_T_max  0.8225
_exptl_absorpt_correction_T_min  0.6747
_exptl_absorpt_correction_type   'Semi-empirical (SADABS)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.538
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4282
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.487
_refine_diff_density_min         -0.401
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.025(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.909
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1314
_refine_ls_number_reflns         15580
_refine_ls_number_restraints     1451
_refine_ls_restrained_S_all      0.903
_refine_ls_R_factor_all          0.1137
_refine_ls_R_factor_gt           0.0603
_refine_ls_shift/su_max          0.117
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0150P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1166
_refine_ls_wR_factor_ref         0.1366
_reflns_number_gt                8779
_reflns_number_total             15580
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b308263f.txt
_cod_data_source_block           l3l8cus2a
_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      Cc
_cod_original_formula_sum        'C79 H60 B4 Cu4 F16 N27.50 O8'
_cod_database_code               7103901