Fundamental Studies of Tungsten Alkylidene Imido Monoalkoxidepyrrolide Complexes
Annie J. Jiang; Jeffrey H. Simpson; Peter Müller; Richard R. Schrock; Journal of the American Chemical Society 131 (2009) 7770–7780; doi:10.1021/ja9012694

data_4104501
_publ_section_title
;
 Fundamental Studies of Tungsten Alkylidene Imido Monoalkoxidepyrrolide
 Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7770
_journal_page_last               7780
_journal_paper_doi               10.1021/ja9012694
_journal_volume                  131
_journal_year                    2009
_chemical_formula_sum            'C47 H64 Br2 N2 O2 Si W'
_chemical_formula_weight         1060.76
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 97.020(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.4500(3)
_cell_length_b                   33.8470(10)
_cell_length_c                   12.9622(4)
_cell_measurement_reflns_used    9863
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      68.21
_cell_measurement_theta_min      3.68
_cell_volume                     4550.4(2)
_computing_cell_refinement       'SAINT 7.4 (Bruker-AXS, 2008)'
_computing_data_collection       'APEX2 2.2 (Bruker-AXS, 2008)'
_computing_data_reduction        'SAINT 7.4 (Bruker-AXS, 2008)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Smart APEX CCD'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0337
_diffrn_reflns_av_sigmaI/netI    0.0308
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       40
_diffrn_reflns_limit_k_min       -39
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            103163
_diffrn_reflns_theta_full        67.73
_diffrn_reflns_theta_max         67.73
_diffrn_reflns_theta_min         2.61
_exptl_absorpt_coefficient_mu    7.304
_exptl_absorpt_correction_T_max  0.6684
_exptl_absorpt_correction_T_min  0.3229
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.548
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2136
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.06
_refine_diff_density_max         1.628
_refine_diff_density_min         -0.516
_refine_diff_density_rms         0.088
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.010(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1013
_refine_ls_number_reflns         15847
_refine_ls_number_restraints     929
_refine_ls_restrained_S_all      1.004
_refine_ls_R_factor_all          0.0261
_refine_ls_R_factor_gt           0.0255
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0340P)^2^+4.8206P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0615
_refine_ls_wR_factor_ref         0.0618
_reflns_number_gt                15570
_reflns_number_total             15847
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja9012694_si_005.cif
_cod_data_source_block           d08042
_cod_database_code               4104501