Complexation of 3,4-bis(cyanamido)cyclobutane-1,2-dione dianion with copper. Crystal structures and spectroscopic data of copper-(I) and -(II) complexes
Fabre, Paul-Louis; Galibert, Anne Marie; Soula, Brigitte; Dahan, Françoise; Castan, Paule; Journal of the Chemical Society, Dalton Transactions  (2001) 1529–; doi:10.1039/b009239h

data_7010452
_publ_section_title
;
 Complexation of 3,4-bis(cyanamido)cyclobutane-1,2-dione dianion with
 copper. Crystal structures and spectroscopic data of copper-(I) and
 -(II) complexes
;
_journal_issue                   9
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              1529
_journal_paper_doi               10.1039/b009239h
_journal_year                    2001
_chemical_formula_sum            'C20 H36 Cu2 N14 O9'
_chemical_formula_weight         743.71
_chemical_name_systematic
; 
? 
;
_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                 90.35(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.9816(13)
_cell_length_b                   14.712(3)
_cell_length_c                   14.746(3)
_cell_measurement_temperature    160(2)
_cell_volume                     1514.6(5)
_computing_cell_refinement       'STOE-IPDS software (Stoe, 2.87, 1997)'
_computing_data_collection       'STOE-IPDS software (Stoe, 2.87, 1997)'
_computing_data_reduction        'XRED (Stoe, 1.08, 1996)'
_computing_molecular_graphics    'ZORTEP (Zsolnai, 1996)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      160(2)
_diffrn_measured_fraction_theta_full 0.932
_diffrn_measured_fraction_theta_max 0.932
_diffrn_measurement_device_type  STOE-IPDS
_diffrn_measurement_method       'Imaging Plate Detector System'
_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  0.0352
_diffrn_reflns_av_sigmaI/netI    0.0219
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            11671
_diffrn_reflns_theta_full        25.88
_diffrn_reflns_theta_max         25.88
_diffrn_reflns_theta_min         2.76
_exptl_absorpt_coefficient_mu    1.476
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.631
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.427
_refine_diff_density_min         -0.525
_refine_diff_density_rms         0.061
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.005(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     436
_refine_ls_number_reflns         5417
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0288
_refine_ls_R_factor_gt           0.0281
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w==1/[\s^2^(Fo^2^)+(0.0559P)^2^+0.0000P] where P==(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0551
_refine_ls_wR_factor_ref         0.0552
_reflns_number_gt                5152
_reflns_number_total             5417
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b009239h.txt
_cod_data_source_block           (2)
_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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w==1/[\s^2^(Fo^2^)+(0.0559P)^2^+0.0000P] where P==(Fo^2^+2Fc^2^)/3'
was changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w==1/[\s^2^(Fo^2^)+(0.0559P)^2^+0.0000P] where P==(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        1514.7(5)
_cod_original_sg_symbol_H-M      P21
_cod_database_code               7010452