Structural diversity and spectral and thermal properties of the first alkaline earth metal tetracyanidoborates: [Mg(H2O)6][B(CN)4]2, [Mg(H2O)2][B(CN)4]2, [Mg(DMF)6][B(CN)4]2, [Ca(H2O)3][B(CN)4]2, and [Ca(H2O)2(CH3CN)][B(CN)4]2.
Nitschke, Christian; Köckerling, Martin; Bernhardt, Eduard; Küppers, Torsten; Willner, Helge; Dalton transactions (Cambridge, England : 2003) 43 (2014) 7128–7138; doi:10.1039/c3dt51945g

data_7029830
_publ_section_title
;
 Structural diversity and spectral and thermal properties of the first
 alkaline earth metal tetracyanidoborates: [Mg(H2O)6][B(CN)4]2,
 [Mg(H2O)2][B(CN)4]2, [Mg(DMF)6][B(CN)4]2, [Ca(H2O)3][B(CN)4]2, and
 [Ca(H2O)2(CH3CN)][B(CN)4]2.
;
_journal_issue                   19
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7128
_journal_page_last               7138
_journal_paper_doi               10.1039/c3dt51945g
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         '(Ca 2+), (C4 N4 B -1)2, (C2 H3 N), 2(H2 O)'
_chemical_formula_sum            'C10 H7 B2 Ca N9 O2'
_chemical_formula_weight         346.95
_chemical_name_systematic
;
Calcium bis-aqua bis-tetracyanoborate acetronitrile solvate
;
_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           'ct.exe (M. K\"ockerling, 1996)'
_cell_angle_alpha                90.00
_cell_angle_beta                 116.538(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2203(2)
_cell_length_b                   12.6637(2)
_cell_length_c                   13.5191(2)
_cell_measurement_reflns_used    9930
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      35.96
_cell_measurement_theta_min      3.04
_cell_volume                     1871.71(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      213(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.948
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0335
_diffrn_reflns_av_sigmaI/netI    0.0299
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            37481
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         36.51
_diffrn_reflns_theta_min         3.44
_exptl_absorpt_coefficient_mu    0.356
_exptl_absorpt_correction_T_max  0.9687
_exptl_absorpt_correction_T_min  0.9164
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker-Nonius SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.231
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.375
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.052
_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     234
_refine_ls_number_reflns         8728
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0482
_refine_ls_R_factor_gt           0.0346
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0490P)^2^+0.1313P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0867
_refine_ls_wR_factor_ref         0.0944
_reflns_number_gt                6825
_reflns_number_total             8728
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt51945g1.cif
_cod_data_source_block           Ca_BCN_Aceto
_cod_depositor_comments
;Adding full bibliography for
 ./tmp-cod-update-bibliographies-12899/cifs/7029830.cif.
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7029830