Synthesis, Characterization, and Electrochemical Studies of PPh3-n (dipp)n(dipp = 2,6-Diisopropylphenyl): Steric and Electronic Effects on the Chemical and Electrochemical Oxidation of a Homologous Series of Triarylphosphines and the Reactivities of the Corresponding Phosphoniumyl Radical Cations
John P. Bullock; Alan M. Bond; René T. Boeré; Twyla M. Gietz; Tracey L. Roemmele; Sonja D. Seagrave; Jason D. Masuda; Masood Parvez; Journal of the American Chemical Society 135 (2013) 11205–11215; doi:10.1021/ja403555d

data_4120192
_publ_contact_author_address
;
Department of Chemistry and Biochemistry
University of Lethbridge
Lethbridge, AB Canada
T1K 3M4
;
_publ_contact_author_email       boere@uleth.ca
_publ_contact_author_fax         +1-403-329-2057
_publ_contact_author_name        'R.T. Boer\'e'
_publ_contact_author_phone       +1-403-329-2045
_publ_section_title
;
 Synthesis, Characterization, and Electrochemical Studies of PPh3-n
 (dipp)n(dipp = 2,6-Diisopropylphenyl): Steric and Electronic Effects on
 the Chemical and Electrochemical Oxidation of a Homologous Series of
 Triarylphosphines and the Reactivities of the Corresponding Phosphoniumyl
 Radical Cations
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11205
_journal_page_last               11215
_journal_paper_doi               10.1021/ja403555d
_journal_volume                  135
_journal_year                    2013
_chemical_formula_moiety         'C24 H27 O P'
_chemical_formula_sum            'C24 H27 O P'
_chemical_formula_weight         362.43
_chemical_name_common
;
 diphenyl(2,6-diisopropylphenyl)phosphine oxide
;
_chemical_name_systematic
;
 oxo-diphenyl(2,6-diisopropylphenyl)phosphane(V)
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 113.529(18)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.267(3)
_cell_length_b                   27.892(10)
_cell_length_c                   9.275(2)
_cell_measurement_reflns_used    7770
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.9
_cell_volume                     1960.8(11)
_computing_cell_refinement
;
 Otwinowski, Z. & Minor, W. (1997). Methods Enzymol. 276, 307.
;
_computing_data_collection
;
 Hooft, R. (1998). COLLECT. Nonius BV, Delft. The Netherlands.
;
_computing_data_reduction
;
 Otwinowski, Z. & Minor, W. (1997). Methods Enzymol. 276, 307.
;
_computing_molecular_graphics    'Mercury (Macrae <i>et al.</i>, 2006)'
_computing_publication_material  'publCIF (Westrip, 2007)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution
;     
 Altomare, A., Cascarano, M., Giacovazzo, C.& Guagliardi, A.
 (1993).  SIR92. J. Appl. Cryst., 26, 343 
;
_diffrn_ambient_pressure         101
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type
;
 Nonius KappaCCD diffractometer
;
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0324
_diffrn_reflns_av_sigmaI/netI    0.0520
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       36
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            7770
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.89
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_type              Nonius
_exptl_absorpt_coefficient_mu    0.150
_exptl_absorpt_correction_T_max  0.9911
_exptl_absorpt_correction_T_min  0.9706
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 Otwinowski, Z. & Minor, W. (1997). Methods Enzymol. 276, 307.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.228
_exptl_crystal_description       plate
_exptl_crystal_F_000             776
_exptl_crystal_recrystallization_method 'Slow cooling'
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.291
_refine_diff_density_min         -0.270
_refine_diff_density_rms         0.048
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         4473
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0729
_refine_ls_R_factor_gt           0.0459
_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^)+(0.0390P)^2^+1.0660P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0969
_refine_ls_wR_factor_ref         0.1093
_reflns_number_gt                3307
_reflns_number_total             4473
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja403555d_si_002_4.cif
_cod_data_source_block           10a_OPPh2(dipp)
_cod_original_sg_symbol_Hall     -P2yn
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4120192