Dinitrogen Functionalization with Terminal Alkynes, Amines, and Hydrazines Promoted by [(η5-C5Me4H)2Zr]2(μ2,η2,η2-N2): Observation of Side-On and End-On Diazenido Complexes in the Reduction of N2 to Hydrazine
Wesley H. Bernskoetter; Jaime A. Pool; Emil Lobkovsky; Paul J. Chirik; Journal of the American Chemical Society 127 (2005) 7901–7911; doi:10.1021/ja050387b

data_4111723
_publ_section_title
;
 Dinitrogen Functionalization with Terminal Alkynes, Amines, and
 Hydrazines Promoted by [(\h5-C5Me4H)2Zr]2(\m2,\h2,\h2-N2): Observation of
 Side-On and End-On Diazenido Complexes in the Reduction of N2 to
 Hydrazine
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7901
_journal_page_last               7911
_journal_paper_doi               10.1021/ja050387b
_journal_volume                  127
_journal_year                    2005
_chemical_formula_sum            'C25 H34 N Zr'
_chemical_formula_weight         439.75
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                64.170(1)
_cell_angle_beta                 68.031(1)
_cell_angle_gamma                80.648(1)
_cell_formula_units_Z            2
_cell_length_a                   9.8743(7)
_cell_length_b                   11.2286(8)
_cell_length_c                   11.5291(9)
_cell_measurement_reflns_used    9163
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      32.33
_cell_measurement_theta_min      2.22
_cell_volume                     1067.02(14)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.914
_diffrn_measured_fraction_theta_max 0.914
_diffrn_measurement_device_type  'Bruker 1K CCD area detector'
_diffrn_measurement_method       '0.3 deg. 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  0.0246
_diffrn_reflns_av_sigmaI/netI    0.0406
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            13867
_diffrn_reflns_theta_full        32.49
_diffrn_reflns_theta_max         32.49
_diffrn_reflns_theta_min         2.09
_exptl_absorpt_coefficient_mu    0.525
_exptl_absorpt_correction_T_max  0.9494
_exptl_absorpt_correction_T_min  0.9024
_exptl_absorpt_correction_type   'semiempirical by SADABS'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.369
_exptl_crystal_density_meas      0
_exptl_crystal_description       block
_exptl_crystal_F_000             462
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.739
_refine_diff_density_min         -1.038
_refine_diff_density_rms         0.082
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    isotropic
_refine_ls_matrix_type           full
_refine_ls_number_parameters     380
_refine_ls_number_reflns         7057
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0439
_refine_ls_R_factor_gt           0.0346
_refine_ls_shift/su_max          0.141
_refine_ls_shift/su_mean         0.005
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0475P)^2^+0.3463P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0812
_refine_ls_wR_factor_ref         0.0849
_reflns_number_gt                6169
_reflns_number_total             7057
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja050387bsi20050325_083704.cif
_cod_data_source_block           wb8
_cod_database_code               4111723