Influence of a [Me2Si] ansa bridge on the barrier to rotation about the Zr‒phenyl bond and on the generation and reactivity of benzyne intermediates: comparison of the structures and reactivity of [Me2Si(C5Me4)2]Zr(Ph)X and Cp*2Zr(Ph)X (X = H, Cl, Ph)
Lee, Hyosun; Bridgewater, Brian M.; Parkin, Gerard; Journal of the Chemical Society, Dalton Transactions  (2000) 4490–; doi:10.1039/b005117i

data_7010028
_publ_section_title
;
 Influence of a [Me2Si] ansa bridge on the barrier to rotation about
 the Zr--phenyl bond and on the generation and reactivity of benzyne
 intermediates: comparison of the structures and reactivity of
 [Me2Si(C5Me4)2]Zr(Ph)X and Cp*2Zr(Ph)X (X&#x2005;=&#x2005;H, Cl, Ph)
;
_journal_issue                   24
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              4490
_journal_paper_doi               10.1039/b005117i
_journal_year                    2000
_chemical_formula_sum            'C30 H40 N2 Si Zr'
_chemical_formula_weight         547.95
_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                83.5780(10)
_cell_angle_beta                 78.9870(10)
_cell_angle_gamma                74.4950(10)
_cell_formula_units_Z            2
_cell_length_a                   9.4411(5)
_cell_length_b                   10.2964(6)
_cell_length_c                   14.6641(8)
_cell_measurement_temperature    223(2)
_cell_volume                     1345.53(13)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.903
_diffrn_measured_fraction_theta_max 0.903
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0163
_diffrn_reflns_av_sigmaI/netI    0.0306
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            10239
_diffrn_reflns_theta_full        28.21
_diffrn_reflns_theta_max         28.21
_diffrn_reflns_theta_min         1.42
_exptl_absorpt_coefficient_mu    0.474
_exptl_absorpt_correction_T_max  0.9541
_exptl_absorpt_correction_T_min  0.9112
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.352
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             576
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.985
_refine_diff_density_min         -0.682
_refine_diff_density_rms         0.073
_refine_ls_extinction_coef       0.0000(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         5989
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.0539
_refine_ls_R_factor_gt           0.0438
_refine_ls_shift/su_max          4.365
_refine_ls_shift/su_mean         0.016
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0561P)^2^+1.4446P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1129
_refine_ls_wR_factor_ref         0.1197
_reflns_number_gt                5095
_reflns_number_total             5989
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b005117i.txt
_cod_data_source_block           zrms10
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7010028