Pentadienyls vs Cyclopentadienyls and Reversal of Metal-Ligand Bonding Affinity with Metal Oxidation State: Synthesis, Molecular Structures, and Electronic Structures of High-Valent Zirconium Pentadienyl Complexes
Asha Rajapakshe; Nadine E. Gruhn; Dennis L. Lichtenberger; Rehan Basta; Atta M. Arif; Richard D. Ernst; Journal of the American Chemical Society 126 (2004) 14105–14116; doi:10.1021/ja040123+

data_4113104
_publ_section_title
;
 Pentadienyls vs Cyclopentadienyls and Reversal of Metal-Ligand Bonding
 Affinity with Metal Oxidation State: Synthesis, Molecular Structures, and
 Electronic Structures of High-Valent Zirconium Pentadienyl Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14105
_journal_page_last               14116
_journal_paper_doi               10.1021/ja040123+
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'C13 H16 I2 Zr'
_chemical_formula_weight         517.28
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 95.2980(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.7300(2)
_cell_length_b                   13.1929(3)
_cell_length_c                   13.0595(4)
_cell_measurement_reflns_used    3348
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      1.018
_cell_volume                     1497.69(7)
_computing_cell_refinement       DENZO-SMN
_computing_data_collection       'Nonius COLLECT'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics    'WinGX, Ortep3'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR97
_diffrn_ambient_temperature      150(1)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Nonius KappaCCD Diffractometer'
_diffrn_measurement_method       'Phi plus Omega scan'
_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  0.0418
_diffrn_reflns_av_sigmaI/netI    0.0711
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            6347
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.32
_exptl_absorpt_coefficient_mu    4.831
_exptl_absorpt_correction_T_max  0.8686
_exptl_absorpt_correction_T_min  0.3780
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO-SMN (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    2.294
_exptl_crystal_description       'thin plate'
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.183
_refine_diff_density_min         -1.160
_refine_diff_density_rms         0.203
_refine_ls_extinction_coef       0.0020(3)
_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   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     210
_refine_ls_number_reflns         3412
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0520
_refine_ls_R_factor_gt           0.0390
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0361P)^2^+1.9717P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0871
_refine_ls_wR_factor_ref         0.0948
_reflns_number_gt                2803
_reflns_number_total             3412
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0401232B_s1_3.cif
_cod_data_source_block           rde068
_cod_database_code               4113104