Convenient Preparation and Detailed Analysis of a Series of NHC-Stabilized Phosphorus(I) Dyes and Their Derivatives.
Macdonald, Charles L. B.; Binder, Justin F.; Swidan, Ala'aeddeen; Nguyen, Jennifer H.; Kosnik, Stephanie C.; Ellis, Bobby D.; Inorganic chemistry 55 (2016) 7152–7166; doi:10.1021/acs.inorgchem.6b01163

data_4348440
_publ_section_title
;
 Convenient Preparation and Detailed Analysis of a Series of
 NHC-Stabilized Phosphorus(I) Dyes and Their Derivatives.
;
_journal_issue                   14
_journal_name_full               'Inorganic chemistry'
_journal_page_first              7152
_journal_page_last               7166
_journal_paper_doi               10.1021/acs.inorgchem.6b01163
_journal_volume                  55
_journal_year                    2016
_chemical_formula_moiety         '(C18 H32 N4 P), Br, 0.33(C2 H3 N)'
_chemical_formula_sum            'C18.67 H33 Br N4.33 P'
_chemical_formula_weight         429.04
_space_group_crystal_system      rhombohedral
_space_group_IT_number           146
_space_group_name_Hall           'P 3*'
_space_group_name_H-M_alt        'R 3 :R'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/6
_cell_angle_alpha                98.79
_cell_angle_beta                 98.79
_cell_angle_gamma                98.79
_cell_formula_units_Z            3
_cell_length_a                   12.1188(9)
_cell_length_b                   12.1188(9)
_cell_length_c                   12.1188(9)
_cell_measurement_reflns_used    7761
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.35
_cell_measurement_theta_min      2.21
_cell_volume                     1709.8(2)
_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-2014/6 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.939
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0749
_diffrn_reflns_av_unetI/netI     0.1021
_diffrn_reflns_Laue_measured_fraction_full 0.984
_diffrn_reflns_Laue_measured_fraction_max 0.939
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            14889
_diffrn_reflns_point_group_measured_fraction_full 0.984
_diffrn_reflns_point_group_measured_fraction_max 0.939
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.492
_diffrn_reflns_theta_min         2.214
_exptl_absorpt_coefficient_mu    1.883
_exptl_absorpt_correction_T_max  0.686
_exptl_absorpt_correction_T_min  0.494
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; Bruker, 2008'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.250
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             676
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.542
_refine_diff_density_min         -0.483
_refine_diff_density_rms         0.074
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.350(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.965
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     236
_refine_ls_number_reflns         4758
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.965
_refine_ls_R_factor_all          0.0600
_refine_ls_R_factor_gt           0.0484
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details     'w=1/[\s^2^(Fo^2^)] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0732
_refine_ls_wR_factor_ref         0.0779
_reflns_Friedel_coverage         1.000
_reflns_Friedel_fraction_full    0.984
_reflns_Friedel_fraction_max     0.939
_reflns_number_gt                4096
_reflns_number_total             4758
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ic6b01163_si_003.cif
_cod_data_source_block           shelx
_cod_original_cell_volume        1709.8(4)
_cod_database_code               4348440
_shelxl_version_number           2014/6
_shelx_res_checksum              25384
_shelx_hkl_checksum              93491