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_7006018
_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         'C25 H59 B K O8 P Si2'
_chemical_formula_sum            'C25 H59 B K O8 P Si2'
_chemical_formula_weight         624.78
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 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                   12.526(8)
_cell_length_b                   15.475(9)
_cell_length_c                   18.411(11)
_cell_measurement_reflns_used    994
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      25.55
_cell_measurement_theta_min      3.50
_cell_volume                     3569(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_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      120(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker APEX2 CCD diffractometer'
_diffrn_measurement_method       'thin-slice \w scans'
_diffrn_radiation_monochromator  'silicon 111'
_diffrn_radiation_source         'Daresbury SRS station 9.8'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.6905
_diffrn_reflns_av_R_equivalents  0.0894
_diffrn_reflns_av_sigmaI/netI    0.0840
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            21325
_diffrn_reflns_theta_full        22.56
_diffrn_reflns_theta_max         22.56
_diffrn_reflns_theta_min         3.47
_diffrn_standards_decay_%        5
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.299
_exptl_absorpt_correction_T_max  0.985
_exptl_absorpt_correction_T_min  0.971
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.163
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.723
_refine_diff_density_min         -0.522
_refine_diff_density_rms         0.086
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.5(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     461
_refine_ls_number_reflns         5086
_refine_ls_number_restraints     580
_refine_ls_restrained_S_all      1.080
_refine_ls_R_factor_all          0.1193
_refine_ls_R_factor_gt           0.1126
_refine_ls_shift/su_max          0.031
_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0794P)^2^+15.4087P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2661
_refine_ls_wR_factor_ref         0.2714
_reflns_number_gt                4632
_reflns_number_total             5086
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b708279g.txt
_cod_data_source_block           ki271_compound_2d
_cod_database_code               7006018