Bis(Imido) Tungsten Complexes: Efficient Precatalysts for the Homogeneous Dimerization of Ethylene
Messinis, Antonis M.; Batsanov, Andrei S.; Wright, William R. H.; Howard, Judith A. K.; Hanton, Martin J.; Dyer, Philip W.; ACS Catalysis 8 (2018) 11249–; doi:10.1021/acscatal.8b02202

data_4515802
_publ_section_title
;
 Bis(Imido) Tungsten Complexes: Efficient Precatalysts for the Homogeneous
 Dimerization of Ethylene
;
_journal_issue                   12
_journal_name_full               'ACS Catalysis'
_journal_page_first              11249
_journal_paper_doi               10.1021/acscatal.8b02202
_journal_volume                  8
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C27 H43 Cl2 N2 P W'
_chemical_formula_sum            'C27 H43 Cl2 N2 P W'
_chemical_formula_weight         681.35
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     heavy
_atom_sites_solution_secondary   difmap
_audit_creation_date             2017-10-24
_audit_creation_method
;
Olex2 1.2-beta
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.5486(9)
_cell_length_b                   16.4202(14)
_cell_length_c                   17.0860(13)
_cell_measurement_reflns_used    9882
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      33.85
_cell_measurement_theta_min      2.29
_cell_volume                     2959.5(4)
_computing_cell_refinement       'SAINT v7.46A (Bruker, 2008)'
_computing_data_collection       'SMART v5.625 (Bruker, 2001)'
_computing_data_reduction        'SAINT v7.46A (Bruker, 2008)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL 2016/6 (Sheldrick, 2015)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 5.6
_diffrn_detector_type            'Bruker SMART CCD 6000 area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker SMART CCD 6000 area detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0516
_diffrn_reflns_av_unetI/netI     0.0463
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            68981
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.970
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         35.00
_diffrn_reflns_theta_min         1.720
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           35.0
_diffrn_source_power             1.75
_diffrn_source_target            Mo
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.155
_exptl_absorpt_correction_T_max  0.7219
_exptl_absorpt_correction_T_min  0.3226
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
R(int) was 0.0845 before and 0.0771 after correction.
The Ratio of minimum to maximum transmission is 0.4469.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.529
_exptl_crystal_description       needle
_exptl_crystal_F_000             1368
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.07
_refine_diff_density_max         4.336
_refine_diff_density_min         -1.352
_refine_diff_density_rms         0.149
_refine_ls_abs_structure_details
;
 Flack x determined using 4767 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). By 
 classical fit to all intensities, x = -0.018(7). Hooft y = -0.014(4).
;
_refine_ls_abs_structure_Flack   -0.016(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.092
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     320
_refine_ls_number_reflns         12654
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0393
_refine_ls_R_factor_gt           0.0334
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0322P)^2^+0.1589P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0711
_refine_ls_wR_factor_ref         0.0731
_reflns_Friedel_coverage         0.797
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.953
_reflns_number_gt                11469
_reflns_number_total             12654
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            W-bisimido.cif
_cod_data_source_block           6_11srv202
_cod_database_code               4515802
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.760
_shelx_estimated_absorpt_t_min   0.287
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2. Others
 Uiso(H8A)=Uiso(H8B)=Uiso(H8C)=FVAR(1)
 Uiso(H9A)=Uiso(H9B)=Uiso(H9C)=FVAR(2)
 Uiso(H11A)=Uiso(H11B)=Uiso(H11C)=FVAR(3)
 Uiso(H12A)=Uiso(H12B)=Uiso(H12C)=FVAR(4)
 Uiso(H20A)=Uiso(H20B)=Uiso(H20C)=FVAR(5)
 Uiso(H21A)=Uiso(H21B)=Uiso(H21C)=FVAR(6)
 Uiso(H23A)=Uiso(H23B)=Uiso(H23C)=FVAR(7)
 Uiso(H24A)=Uiso(H24B)=Uiso(H24C)=FVAR(8)
 Uiso(H25A)=Uiso(H25B)=Uiso(H25C)=FVAR(9)
 Uiso(H26A)=Uiso(H26B)=Uiso(H26C)=FVAR(10)
 Uiso(H27A)=Uiso(H27B)=Uiso(H27C)=FVAR(11)
3.a Riding coordinates:
 C3(H3), C4(H4), C5(H5), C7(H7), C10(H10), C15(H15), C16(H16), C17(H17),
 C19(H19), C22(H22)
3.b Rotating group:
 C8(H8A,H8B,H8C), C9(H9A,H9B,H9C), C11(H11A,H11B,H11C), C12(H12A,H12B,H12C),
 C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C23(H23A,H23B,H23C), C24(H24A,H24B,
 H24C), C25(H25A,H25B,H25C), C26(H26A,H26B,H26C), C27(H27A,H27B,H27C)
;
_shelx_res_checksum              21869
_shelx_hkl_checksum              26614
_olex2_submission_special_instructions 'No special instructions were received'