High Catalytic Rates for Hydrogen Production Using Nickel Electrocatalysts with Seven-Membered Cyclic Diphosphine Ligands Containing One Pendant Amine
Michael P. Stewart; Ming-Hsun Ho; Stefan Wiese; Mary Lou Lindstrom; Colleen E. Thogerson; Simone Raugei; R. Morris Bullock; Monte L. Helm; Journal of the American Chemical Society 135 (2013) 6033–6046; doi:10.1021/ja400181a

data_4119609
_publ_section_title
;
 High Catalytic Rates for Hydrogen Production Using Nickel
 Electrocatalysts with Seven-Membered Cyclic Diphosphine Ligands
 Containing One Pendant Amine
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6033
_journal_page_last               6046
_journal_paper_doi               10.1021/ja400181a
_journal_volume                  135
_journal_year                    2013
_chemical_formula_moiety         'C46 H50 N2 Ni P4, 2(B F4), 2(C2 H3 N)'
_chemical_formula_sum            'C50 H56 B2 F8 N4 Ni P4'
_chemical_formula_weight         1069.20
_chemical_name_common            '[Ni(7PPh2NPhMe)2](BF4)2'
_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                93.072(2)
_cell_angle_beta                 93.8470(10)
_cell_angle_gamma                104.0340(10)
_cell_formula_units_Z            1
_cell_length_a                   9.5270(3)
_cell_length_b                   10.7718(3)
_cell_length_c                   12.1475(3)
_cell_measurement_reflns_used    9916
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.86
_cell_measurement_theta_min      2.49
_cell_volume                     1203.53(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0356
_diffrn_reflns_av_sigmaI/netI    0.0353
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            24620
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.21
_exptl_absorpt_coefficient_mu    0.609
_exptl_absorpt_correction_T_max  0.9473
_exptl_absorpt_correction_T_min  0.8778
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; (Sheldrick, 2006)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.475
_exptl_crystal_description       block
_exptl_crystal_F_000             554
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.701
_refine_diff_density_min         -0.458
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     315
_refine_ls_number_reflns         5972
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0516
_refine_ls_R_factor_gt           0.0377
_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^)+(0.0461P)^2^+0.7542P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0909
_refine_ls_wR_factor_ref         0.0979
_reflns_number_gt                4821
_reflns_number_total             5972
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja400181a_si_002_2.cif
_cod_data_source_block           helm082_0m
_cod_original_sg_symbol_Hall     -P1
_cod_database_code               4119609