Chelate-Controlled Synthesis of Racemic ansa-Zirconocenes
Matthew D. LoCoco; Xingwang Zhang; Richard F. Jordan; Journal of the American Chemical Society 126 (2004) 15231–15244; doi:10.1021/ja046629+

data_4113188
_publ_section_title
;
 Chelate-Controlled Synthesis of Racemic ansa-Zirconocenes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15231
_journal_page_last               15244
_journal_paper_doi               10.1021/ja046629+
_journal_volume                  126
_journal_year                    2004
_chemical_formula_moiety         'C25 H26 N2 Zr'
_chemical_formula_sum            'C25 H26 N2 Zr'
_chemical_formula_weight         445.70
_chemical_name_common            '[Cp2]Zr{PhN(CH2)3NPh}'
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.627(3)
_cell_length_b                   7.7849(12)
_cell_length_c                   14.749(2)
_cell_measurement_reflns_used    13827
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.03
_cell_measurement_theta_min      2.31
_cell_volume                     2023.9(5)
_computing_cell_refinement       'SAINT (Bruker AXS)'
_computing_data_collection       'SMART 5.624 (Bruker AXS)'
_computing_data_reduction        'SAINT (Bruker AXS)'
_computing_molecular_graphics    'shelxtl 5.1 (Bruker AXS)'
_computing_publication_material  'shelxtl 5.1 (Bruker AXS)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART APEX'
_diffrn_measurement_method       '\W 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  0.0332
_diffrn_reflns_av_sigmaI/netI    0.0247
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            13827
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.31
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.556
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.892
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS, SHELXTL (version 5.1) program library 
(G. Sheldrick, Bruker Analytical X-ray Systems, Madison, WI)
;
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    1.463
_exptl_crystal_density_meas      1.463
_exptl_crystal_description       Fragment
_exptl_crystal_F_000             920
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.543
_refine_diff_density_min         -0.245
_refine_diff_density_rms         0.063
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.04(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.146
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         3547
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.146
_refine_ls_R_factor_all          0.0267
_refine_ls_R_factor_gt           0.0265
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0308P)^2^+1.0008P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0640
_refine_ls_wR_factor_ref         0.0642
_reflns_number_gt                3525
_reflns_number_total             3547
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0466292Bsi20040908_120750.cif
_cod_data_source_block           matt05a
_cod_database_code               4113188