Carbene-Stabilized Beryllium Borohydride
Robert J. Gilliard; Mariham Y. Abraham; Yuzhong Wang; Pingrong Wei; Yaoming Xie; Brandon Quillian; Henry F. Schaefer; Paul v. R. Schleyer; Gregory H. Robinson; Journal of the American Chemical Society 134 (2012) 9953–9955; doi:10.1021/ja304514f

data_4118109
_publ_section_title
;
 Carbene-Stabilized Beryllium Borohydride
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9953
_journal_page_last               9955
_journal_paper_doi               10.1021/ja304514f
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C27 H36 Be Cl2 N2'
_chemical_formula_weight         468.49
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 101.4190(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.4308(9)
_cell_length_b                   18.1887(15)
_cell_length_c                   15.4186(13)
_cell_measurement_reflns_used    3309
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      17.715
_cell_measurement_theta_min      2.173
_cell_volume                     2867.4(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'BRUKER APEX II'
_diffrn_measurement_method       'OMEGA SCAN'
_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  0.0613
_diffrn_reflns_av_sigmaI/netI    0.0401
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            30313
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.17
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.242
_exptl_absorpt_correction_T_max  0.9904
_exptl_absorpt_correction_T_min  0.9510
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.085
_exptl_crystal_description       plate
_exptl_crystal_F_000             1000
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.380
_refine_diff_density_min         -0.333
_refine_diff_density_rms         0.031
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.006
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     355
_refine_ls_number_reflns         5043
_refine_ls_number_restraints     143
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.1284
_refine_ls_R_factor_gt           0.0565
_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^)+(0.0782P)^2^+1.0035P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1431
_refine_ls_wR_factor_ref         0.1912
_reflns_number_gt                2484
_reflns_number_total             5043
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja304514f_si_002.cif
_cod_data_source_block           j1
_cod_database_code               4118109