Synthesis and Characterization of the Silver Maleonitrilediselenolates and Silver Maleonitriledithiolates [K([2.2.2]-cryptand)]4[Ag4(Se2C2(CN)2)4], [Na([2.2.2]-cryptand)]4[Ag4(S2C2(CN)2)4].0.33MeCN, [NBu4]4[Ag4(S2C2(CN)2)4], [K([2.2.2]-cryptand)]3[Ag(Se2C2(CN)2)2].2MeCN, and [Na([2.2.2]-cryptand)]3[Ag(S2C2(CN)2)2]
Craig C. McLauchlan; James A. Ibers; Inorganic Chemistry 40 (2001) 1809–1815; doi:10.1021/ic000868q

data_4319492
_publ_section_title
;
 Synthesis and Characterization of the Silver Maleonitrilediselenolates
 and Silver Maleonitriledithiolates
 [K([2.2.2]-cryptand)]4[Ag4(Se2C2(CN)2)4],
 [Na([2.2.2]-cryptand)]4[Ag4(S2C2(CN)2)4].0.33MeCN,
 [NBu4]4[Ag4(S2C2(CN)2)4], [K([2.2.2]-cryptand)]3[Ag(Se2C2(CN)2)2].2MeCN,
 and [Na([2.2.2]-cryptand)]3[Ag(S2C2(CN)2)2]
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1809
_journal_page_last               1815
_journal_paper_doi               10.1021/ic000868q
_journal_volume                  40
_journal_year                    2001
_chemical_formula_moiety         '2 (C18 H36 K N2 O6) (C8 Cu N4 Se4)'
_chemical_formula_sum            'C44 H72 Cu K2 N8 O12 Se4'
_chemical_formula_weight         1362.68
_chemical_name_common
;
 Bis(potassium([2.2.2]-cryptand)) bis(maleonitrilediselenolato)copper(II)
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 107.05(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.211(2)
_cell_length_b                   16.086(3)
_cell_length_c                   15.158(3)
_cell_measurement_temperature    154(2)
_cell_volume                     2846.6(10)
_computing_cell_refinement       'SMART Version 5.054 (Bruker AXS, 1999)'
_computing_data_collection       'SMART Version 5.054 (Bruker AXS, 1999)'
_computing_data_reduction        'SAINT Version 6.01 (Bruker AXS, 1999)'
_computing_molecular_graphics    'SHELXTL-97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      154(2)
_diffrn_measured_fraction_theta_full 0.933
_diffrn_measured_fraction_theta_max 0.933
_diffrn_measurement_device_type  'Bruker AXS SMART-1000 with CCD'
_diffrn_measurement_method       /w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'standard focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0316
_diffrn_reflns_av_sigmaI/netI    0.0328
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            25495
_diffrn_reflns_theta_full        28.70
_diffrn_reflns_theta_max         28.70
_diffrn_reflns_theta_min         1.89
_diffrn_standards_decay_%        '< 2'
_exptl_absorpt_coefficient_mu    3.149
_exptl_absorpt_correction_T_max  .80827
_exptl_absorpt_correction_T_min  .48431
_exptl_absorpt_correction_type   'empirical (Sheldrick, 1998)'
_exptl_absorpt_process_details
;
    Face indexed in XPREP then ran SADABS
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.590
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1382
_exptl_crystal_size_max          .320
_exptl_crystal_size_mid          .123
_exptl_crystal_size_min          .077
_refine_diff_density_max         1.726
_refine_diff_density_min         -1.621
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.312
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     322
_refine_ls_number_reflns         6871
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.312
_refine_ls_R_factor_all          0.0521
_refine_ls_R_factor_gt           0.0351
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
; calc 
 1/[\s^2^(Fo^2^)+(0.0300Fo^2^)^2^]  
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0766
_refine_ls_wR_factor_ref         0.0803
_reflns_number_gt                5288
_reflns_number_total             6871
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic000868q_5.cif
_cod_data_source_block           cumns2
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4319492