Alkaline Earth Metal Complexes of a Phosphine-Borane-Stabilized Carbanion: Synthesis, Structures, and Stabilities
Keith Izod; Corinne Wills; William Clegg; Ross W. Harrington; Inorganic Chemistry 46 (2007) 4320–4325; doi:10.1021/ic062459l

data_4307978
_publ_section_title
;
Alkaline Earth Metal Complexes of a Phosphine-Borane-Stabilized
Carbanion: Synthesis, Structures, and Stabilities
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              4320
_journal_page_last               4325
_journal_paper_doi               10.1021/ic062459l
_journal_volume                  46
_journal_year                    2007
_chemical_formula_moiety         'C38 H94 B2 Ba O5 P2 Si4'
_chemical_formula_sum            'C38 H94 B2 Ba O5 P2 Si4'
_chemical_formula_weight         964.39
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.541(4)
_cell_length_b                   13.8433(7)
_cell_length_c                   22.928(11)
_cell_measurement_reflns_used    382
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.50
_cell_volume                     5567(3)
_computing_cell_refinement       EvalCCD
_computing_data_collection       'Nonius COLLECT'
_computing_data_reduction        EvalCCD
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Nonius KappaCCD diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0384
_diffrn_reflns_av_sigmaI/netI    0.0246
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            74138
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         4.15
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.890
_exptl_absorpt_correction_T_max  0.856
_exptl_absorpt_correction_T_min  0.717
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.151
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       slab
_exptl_crystal_F_000             2056
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.999
_refine_diff_density_min         -0.626
_refine_diff_density_rms         0.096
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.47(2)
_refine_ls_extinction_coef       0.00023(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     489
_refine_ls_number_reflns         9755
_refine_ls_number_restraints     237
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0661
_refine_ls_R_factor_gt           0.0491
_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 w=1/[\s^2^(Fo^2^)+(0.0478P)^2^+21.2543P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1139
_refine_ls_wR_factor_ref         0.1281
_reflns_number_gt                8000
_reflns_number_total             9755
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ic062459l-file002_4.cif
_cod_data_source_block           ki245_compound_8
_cod_original_cell_volume        5568(3)
_cod_database_code               4307978