A New Class of CVD Precursors to Metal Borides: Cr(B3H8)2 and Related Octahydrotriborate Complexes
Dean M. Goedde; Gregory S. Girolami; Journal of the American Chemical Society 126 (2004) 12230–12231; doi:10.1021/ja046906c

data_4112987
_publ_section_title
;
 A New Class of CVD Precursors to Metal Borides: Cr(B3H8)2 and Related
 Octahydrotriborate Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12230
_journal_page_last               12231
_journal_paper_doi               10.1021/ja046906c
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'B6 Cr H16'
_chemical_formula_weight         132.99
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                105.192(6)
_cell_angle_beta                 93.810(6)
_cell_angle_gamma                111.102(6)
_cell_formula_units_Z            1
_cell_length_a                   4.3898(18)
_cell_length_b                   5.694(2)
_cell_length_c                   9.023(4)
_cell_measurement_temperature    193(2)
_cell_volume                     199.79(14)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.935
_diffrn_measured_fraction_theta_max 0.935
_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  0.0945
_diffrn_reflns_av_sigmaI/netI    0.1038
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            1777
_diffrn_reflns_theta_full        28.26
_diffrn_reflns_theta_max         28.26
_diffrn_reflns_theta_min         2.38
_exptl_absorpt_coefficient_mu    1.316
_exptl_absorpt_correction_T_max  0.950
_exptl_absorpt_correction_T_min  0.671
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'SHELX face-indexed'
_exptl_crystal_density_diffrn    1.105
_exptl_crystal_F_000             70
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.417
_refine_diff_density_min         -0.525
_refine_diff_density_rms         0.103
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     66
_refine_ls_number_reflns         925
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0638
_refine_ls_R_factor_gt           0.0514
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0560P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1139
_refine_ls_wR_factor_ref         0.1198
_reflns_number_gt                795
_reflns_number_total             925
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja046906csi20040810_110948.cif
_cod_data_source_block           h55kfac
_cod_original_cell_volume        199.77(14)
_cod_original_formula_sum        'H16 B6 Cr'
_cod_database_code               4112987