Roles of Hydrogen Bonding in Proton Transfer to κ<sup>P</sup>,κ<sup>N</sup>,κ<sup>P</sup>-N(CH<sub>2</sub>CH<sub>2</sub>P <i> <sup>i</sup> </i> Pr<sub>2</sub>)<sub>2</sub>-Ligated Nickel Pincer Complexes.
Wellala, Nadeesha P. N.; Luebking, John D.; Krause, Jeanette A.; Guan, Hairong; ACS omega 3 (2018) 4986–5001; doi:10.1021/acsomega.8b00777

data_4515979
_publ_section_title
;
 Roles of Hydrogen Bonding in Proton Transfer to
 \k<sup>P</sup>,\k<sup>N</sup>,\k<sup>P</sup>-N(CH<sub>2</sub>CH<sub>2</sub>P
 <i> <sup>i</sup> </i> Pr<sub>2</sub>)<sub>2</sub>-Ligated Nickel Pincer
 Complexes.
;
_journal_issue                   5
_journal_name_full               'ACS omega'
_journal_page_first              4986
_journal_page_last               5001
_journal_paper_doi               10.1021/acsomega.8b00777
_journal_volume                  3
_journal_year                    2018
_chemical_formula_moiety         'C22 H41 N Ni P2'
_chemical_formula_sum            'C22 H41 N Ni P2'
_chemical_formula_weight         440.21
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 96.8592(13)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.0515(4)
_cell_length_b                   12.4032(5)
_cell_length_c                   18.8698(7)
_cell_measurement_reflns_used    9169
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.29
_cell_measurement_theta_min      2.62
_cell_volume                     2335.67(16)
_computing_cell_refinement       'Bruker SAINT v8.38A (Bruker, 2016)'
_computing_data_collection       'Bruker APEX3 v2017.3.0 (Bruker, 2017)'
_computing_data_reduction        'Bruker SAINT v8.38A (Bruker, 2016)'
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_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker D8 Venture Photon-II'
_diffrn_measurement_method       '\w-\f scans'
_diffrn_radiation_monochromator  'multilayer mirror'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0361
_diffrn_reflns_av_unetI/netI     0.0180
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            56632
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.364
_diffrn_reflns_theta_min         2.928
_diffrn_source                   'Incoatec Mo-microfocus 3.0'
_exptl_absorpt_coefficient_mu    0.974
_exptl_absorpt_correction_T_max  0.862
_exptl_absorpt_correction_T_min  0.802
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS 2016/2 (L.Krause, et al. J. Appl. Cryst. (2015), 48, 3-10'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_description       plate
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.115
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.035
_refine_diff_density_max         0.348
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     243
_refine_ls_number_reflns         5825
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0308
_refine_ls_R_factor_gt           0.0251
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0241P)^2^+1.0313P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0582
_refine_ls_wR_factor_ref         0.0617
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5197
_reflns_number_total             5825
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ao8b00777_si_002.cif
_cod_data_source_block           2
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4515979
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.896
_shelx_estimated_absorpt_t_max   0.967
_shelx_res_checksum              61477
_shelx_hkl_checksum              4210