Alkali metal complexes of a phosphine-borane-stabilised carbanion: influence of co-ligands on structure.
Izod, Keith; Wills, Corinne; Clegg, William; Harrington, Ross W.; Dalton transactions (Cambridge, England : 2003)  (2007) 3669–3675; doi:10.1039/b708279g

data_7006020
_publ_section_title
;
 Alkali metal complexes of a phosphine-borane-stabilised carbanion:
 influence of co-ligands on structure.
;
_journal_issue                   33
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3669
_journal_page_last               3675
_journal_paper_doi               10.1039/b708279g
_journal_year                    2007
_chemical_formula_moiety         'C36 H100 B2 N6 P2 Rb2 Si4'
_chemical_formula_sum            'C36 H100 B2 N6 P2 Rb2 Si4'
_chemical_formula_weight         984.08
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.86(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.233(6)
_cell_length_b                   9.272(4)
_cell_length_c                   29.117(10)
_cell_measurement_reflns_used    364
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27
_cell_measurement_theta_min      2.50
_cell_volume                     5852(4)
_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    SIR97
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0407
_diffrn_reflns_av_sigmaI/netI    0.0240
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            44061
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         4.17
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.837
_exptl_absorpt_correction_T_max  0.556
_exptl_absorpt_correction_T_min  0.463
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.117
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2112
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.32
_refine_diff_density_max         1.360
_refine_diff_density_min         -0.607
_refine_diff_density_rms         0.105
_refine_ls_extinction_coef       0.0016(2)
_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   1.101
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         5129
_refine_ls_number_restraints     14
_refine_ls_restrained_S_all      1.102
_refine_ls_R_factor_all          0.0585
_refine_ls_R_factor_gt           0.0460
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0758P)^2^+19.0719P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1260
_refine_ls_wR_factor_ref         0.1364
_reflns_number_gt                4294
_reflns_number_total             5129
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b708279g.txt
_cod_data_source_block           ki262_compound_7
_cod_original_cell_volume        5851(4)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7006020