Proton transfer vs. oligophosphine formation by P-C/P-H σ-bond metathesis: decoding the competing Brønsted and Lewis type reactivities of imidazolio-phosphines.
Cicač-Hudi, Mario; Feil, Christoph M.; Birchall, Nicholas; Nieger, Martin; Gudat, Dietrich; Dalton transactions (Cambridge, England : 2003) 49 (2020) 17401–17413; doi:10.1039/d0dt03633a

data_7706111
_publ_section_title
;
 Proton transfer vs. oligophosphine formation by P-C/P-H \s-bond
 metathesis: decoding the competing Br\/onsted and Lewis type reactivities
 of imidazolio-phosphines.
;
_journal_issue                   47
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              17401
_journal_page_last               17413
_journal_paper_doi               10.1039/d0dt03633a
_journal_volume                  49
_journal_year                    2020
_chemical_formula_moiety         'C21 H26 N2 P, I, 0.5(C2 H3 N)'
_chemical_formula_sum            'C22 H27.5 I N2.5 P'
_chemical_formula_weight         484.83
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2020-03-23 deposited with the CCDC.	2020-11-09 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 114.254(2)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.8150(8)
_cell_length_b                   19.1134(9)
_cell_length_c                   14.7481(7)
_cell_measurement_reflns_used    13048
_cell_measurement_temperature    130(2)
_cell_measurement_theta_max      33.170
_cell_measurement_theta_min      1.645
_cell_volume                     4578.5(4)
_computing_cell_refinement       'Bruker ApexII Software Suite, 2008'
_computing_data_collection       'Bruker ApexII Software Suite, 2008'
_computing_data_reduction        'Bruker ApexII Software Suite, 2008'
_computing_molecular_graphics    'SHELXS plus XP (Sheldrick, 1991)'
_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      130(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker Kappa ApexII Duo'
_diffrn_measurement_method       'Omega and phi scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0304
_diffrn_reflns_av_unetI/netI     0.0285
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            81625
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         33.170
_diffrn_reflns_theta_min         1.645
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    1.478
_exptl_absorpt_correction_T_max  0.7353
_exptl_absorpt_correction_T_min  0.5919
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'BLESSING 1995'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.407
_exptl_crystal_description       prism
_exptl_crystal_F_000             1960
_exptl_crystal_size_max          0.489
_exptl_crystal_size_mid          0.421
_exptl_crystal_size_min          0.266
_refine_diff_density_max         1.232
_refine_diff_density_min         -0.832
_refine_diff_density_rms         0.086
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     533
_refine_ls_number_reflns         17413
_refine_ls_number_restraints     85
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.0530
_refine_ls_R_factor_gt           0.0323
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0346P)^2^+3.2003P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0734
_refine_ls_wR_factor_ref         0.0830
_reflns_Friedel_coverage         0.000
_reflns_number_gt                13044
_reflns_number_total             17413
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0dt03633a2.cif
_cod_data_source_block           g479_mn
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_original_formula_sum        'C22 H27.50 I N2.50 P'
_cod_database_code               7706111
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.532
_shelx_estimated_absorpt_t_max   0.695
_shelx_res_checksum              50966