N-heterocyclic phosphenium and phosphido nickel complexes supported by a pincer ligand framework.
Evers-McGregor, Deirdra A; Bezpalko, Mark W.; Foxman, Bruce M.; Thomas, Christine M.; Dalton transactions (Cambridge, England : 2003) 45 (2016) 1918–1929; doi:10.1039/c5dt03549j

data_7036821
_publ_section_title
;
 N-heterocyclic phosphenium and phosphido nickel complexes supported by a
 pincer ligand framework.
;
_journal_issue                   5
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1918
_journal_page_last               1929
_journal_paper_doi               10.1039/c5dt03549j
_journal_volume                  45
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C76 H64 N4 Ni2 P6'
_chemical_formula_sum            'C76 H64 N4 Ni2 P6'
_chemical_formula_weight         1336.64
_chemical_properties_physical
'Air-sensitive, Moisture-sensitive, Oxygen-sensitive'
_space_group_IT_number           120
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4 -2c'
_symmetry_space_group_name_H-M   'I -4 c 2'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_audit_creation_date             2015-03-05
_audit_creation_method           CRYSTALS_ver_14.61
_audit_update_record
;
2015-08-26 deposited with the CCDC.
2015-10-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.6009(8)
_cell_length_b                   16.6009(8)
_cell_length_c                   25.9072(16)
_cell_measurement_reflns_used    9755
_cell_measurement_temperature    120
_cell_measurement_theta_max      29
_cell_measurement_theta_min      3
_cell_volume                     7139.8(7)
_computing_cell_refinement       'Apex2 (Bruker AXS, 2006)'
_computing_data_collection       'Apex2 (Bruker AXS, 2006)'
_computing_data_reduction        'Apex2 (Bruker AXS, 2006)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      120
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Bruker Kappa Apex2'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.065
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            4786
_diffrn_reflns_theta_full        28.622
_diffrn_reflns_theta_max         29.206
_diffrn_reflns_theta_min         1.572
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.705
_exptl_absorpt_correction_T_max  0.87
_exptl_absorpt_correction_T_min  0.82
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
; 
 Analytical Absorption (De Meulenaer & Tompa, 1965) 
;
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.243
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2776
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: pentane, benzene'
_exptl_crystal_size_max          0.380
_exptl_crystal_size_mid          0.280
_exptl_crystal_size_min          0.200
_platon_squeeze_details
;
During the structure solution, electron density difference 
maps revealed that there were considerable disordered 
solvent molecules which could not be successfully modeled.  
From history, the remaining solvate was likely pentane in a 
volume of 1234.5 \%A3 per unit cell (17.3%).  It appeared 
that the cavity area contained about eight pentane molecules, 
located in pairs near the four 222 positions at (0, 1/2, 0); 
(0, 1/2, 1/2); (1/2, 0, 1/2); (1/2, 1, 0). Modeling with or 
without restraints was unsuccessful, as was step by step 
acquisition of peaks using successive electron density 
difference maps. Thus, the structure factors were modified 
using the PLATON SQUEEZE technique, in order to produce a 
"solvate-free" structure factor set.  PLATON reported a 
total electron density of 350 e- per unit cell, likely 
representing eight pentane molecules, consistent with our 
earlier observations.  Use of the SQUEEZE technique resulted 
in a decrease of ca. 3.8 % in R.  
;
_refine_diff_density_max         0.84
_refine_diff_density_min         -2.75
_refine_ls_abs_structure_details 'Flack (1983), 2220 Friedel-pairs'
_refine_ls_abs_structure_Flack   0.010(15)
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9777
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         4786
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0637
_refine_ls_R_factor_gt           0.0514
_refine_ls_shift/su_max          0.0027460
_refine_ls_shift/su_mean         0.0007454
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.05P)^2^ +39.23P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1284
_refine_ls_wR_factor_gt          0.1220
_refine_ls_wR_factor_ref         0.1284
_reflns_limit_h_max              22
_reflns_limit_h_min              0
_reflns_limit_k_max              22
_reflns_limit_k_min              0
_reflns_limit_l_max              35
_reflns_limit_l_min              0
_reflns_number_gt                4015
_reflns_number_total             4786
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   0.00
_oxford_diffrn_Wilson_scale      0.00
_oxford_refine_ls_r_factor_ref   0.0637
_oxford_refine_ls_scale          0.057406(12)
_oxford_reflns_number_all        4786
_oxford_reflns_threshold_expression_ref I>-10.0\s(I)
_oxford_structure_analysis_title 'dem4_162_0m in I-4c2'
_cod_data_source_file            c5dt03549j3.cif
_cod_data_source_block           10
_cod_depositor_comments
;
Adding full bibliography for 7036819--7036822.cif.

2018-09-03
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_cell_volume        7139.8(4)
_cod_original_sg_symbol_Hall     'I -4 -2c '
_cod_original_sg_symbol_H-M      'I -4 c 2 '
_cod_original_formula_moiety     'C38 H32 N2 Ni1 P3'
_cod_original_formula_sum        'C38 H32 N2 Ni1 P3'
_cod_original_formula_units_Z    8
_cod_original_formula_weight     668.32
_cod_database_code               7036821