Synthesis, characterisation, and dehydrocoupling ability of zirconium complexes bearing hindered bis(amido)silyl ligands.
Lummis, Paul A.; McDonald, Robert; Ferguson, Michael J.; Rivard, Eric; Dalton transactions (Cambridge, England : 2003) 44 (2015) 7009–7020; doi:10.1039/c5dt00306g

data_7034304
_publ_section_title
;
 Synthesis, characterisation, and dehydrocoupling ability of zirconium
 complexes bearing hindered bis(amido)silyl ligands.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7009
_journal_page_last               7020
_journal_paper_doi               10.1039/c5dt00306g
_journal_volume                  44
_journal_year                    2015
_chemical_formula_moiety         'C32 H54 Cl2 N3 Si Zr, C16 H32 Li O4'
_chemical_formula_sum            'C48 H86 Cl2 Li N3 O4 Si Zr'
_chemical_formula_weight         966.34
_chemical_name_systematic
; 
 ? 
;
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2015-01-12 deposited with the CCDC.
2015-03-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.266(2)
_cell_length_b                   18.419(3)
_cell_length_c                   19.316(3)
_cell_measurement_reflns_used    5516
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      18.16
_cell_measurement_theta_min      2.21
_cell_volume                     5431.4(14)
_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'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'DIRDIF-2008 (Beurskens et al., 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0788
_diffrn_reflns_av_unetI/netI     0.0630
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            43340
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.986
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.669
_diffrn_reflns_theta_min         1.528
_exptl_absorpt_coefficient_mu    0.363
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7591
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.182
_exptl_crystal_description       prism
_exptl_crystal_F_000             2072
_exptl_crystal_size_max          0.242
_exptl_crystal_size_mid          0.235
_exptl_crystal_size_min          0.205
_refine_diff_density_max         0.664
_refine_diff_density_min         -0.570
_refine_diff_density_rms         0.059
_refine_ls_abs_structure_details
; 
 Flack x determined using 3887 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons and Flack (2004), Acta Cryst. A60, s61). 
;
_refine_ls_abs_structure_Flack   0.010(19)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.054
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     536
_refine_ls_number_reflns         11293
_refine_ls_number_restraints     23
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0586
_refine_ls_R_factor_gt           0.0485
_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^)+(0.0445P)^2^+1.9706P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1088
_refine_ls_wR_factor_ref         0.1135
_reflns_Friedel_coverage         0.816
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.984
_reflns_number_gt                9794
_reflns_number_total             11293
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5dt00306g2.cif
_cod_data_source_block           riv1113
_cod_depositor_comments
'Adding full bibliography for 7034303--7034308.cif.'
_cod_original_cell_volume        5431.5(14)
_cod_database_code               7034304
_shelx_estimated_absorpt_t_min   0.917
_shelx_estimated_absorpt_t_max   0.929
_shelxl_version_number           2013-4
_shelx_res_checksum              32802