Catalytic Proton Coupled Electron Transfer from Metal Hydrides to Titanocene Amides, Hydrazides and Imides: Determination of Thermodynamic Parameters Relevant to Nitrogen Fixation.
Pappas, Iraklis; Chirik, Paul J.; Journal of the American Chemical Society 138 (2016) 13379–13389; doi:10.1021/jacs.6b08009

data_4130950
_publ_section_title
;
 Catalytic Proton Coupled Electron Transfer from Metal Hydrides to
 Titanocene Amides, Hydrazides and Imides: Determination of Thermodynamic
 Parameters Relevant to Nitrogen Fixation.
;
_journal_issue                   40
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13379
_journal_page_last               13389
_journal_paper_doi               10.1021/jacs.6b08009
_journal_volume                  138
_journal_year                    2016
_chemical_formula_sum            'C35 H57 Cr N O3 Si3 Ti'
_chemical_formula_weight         723.98
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_cell_setting           monoclinic
_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                90.000
_cell_angle_beta                 103.507(5)
_cell_angle_gamma                90.000
_cell_formula_units_Z            8
_cell_length_a                   16.947(5)
_cell_length_b                   25.011(5)
_cell_length_c                   18.486(5)
_cell_measurement_reflns_used    9311
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      63.67
_cell_measurement_theta_min      3.03
_cell_volume                     7619(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'ORTEP 3 (Farraguia, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR 92 (Giacavazzo, 1993)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'BRUKER APEX2 CCD'
_diffrn_measurement_method       'Phi and Omega Scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54185
_diffrn_reflns_av_R_equivalents  0.0505
_diffrn_reflns_av_sigmaI/netI    0.0396
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            49736
_diffrn_reflns_theta_full        63.72
_diffrn_reflns_theta_max         63.72
_diffrn_reflns_theta_min         3.03
_exptl_absorpt_coefficient_mu    5.290
_exptl_absorpt_correction_T_max  0.8163
_exptl_absorpt_correction_T_min  0.4176
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Columnar
_exptl_crystal_F_000             3088
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         2.400
_refine_diff_density_min         -1.263
_refine_diff_density_rms         0.102
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     833
_refine_ls_number_reflns         12372
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0861
_refine_ls_R_factor_gt           0.0731
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0775P)^2^+43.4654P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1796
_refine_ls_wR_factor_ref         0.1885
_reflns_number_gt                10333
_reflns_number_total             12372
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ja6b08009_si_002.cif
_cod_data_source_block           ip41
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 

2020-05-08
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_formula_sum            'C70 H114 Cr2 N2 O6 Si6 Ti2'
_cod_original_formula_weight         1447.97
_cod_original_formula_units_Z            4
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               4130950