CH-anion versus anion-π interactions in the crystal and in solution of pentafluorobenzyl phosphonium salts.
Müller, Michael; Albrecht, Markus; Sackmann, Johannes; Hoffmann, Andreas; Dierkes, Fiete; Valkonen, Arto; Rissanen, Kari; Dalton transactions (Cambridge, England : 2003) 39 (2010) 11329–11334; doi:10.1039/c0dt00766h

data_7026832
_publ_section_title
;
 CH-anion versus anion-\p interactions in the crystal and in solution of
 pentafluorobenzyl phosphonium salts.
;
_journal_issue                   47
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              11329
_journal_page_last               11334
_journal_paper_doi               10.1039/c0dt00766h
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C25 H17 F5 P, C24 H20 B'
_chemical_formula_sum            'C49 H37 B F5 P'
_chemical_formula_weight         762.57
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 102.5470(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   32.7210(7)
_cell_length_b                   14.0835(3)
_cell_length_c                   17.1709(3)
_cell_measurement_reflns_used    9746
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      28.283
_cell_measurement_theta_min      0.407
_cell_volume                     7723.8(3)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'Collect (Bruker, 2008)'
_computing_data_reduction        DENZO-SMN
_computing_molecular_graphics
'ORTEP-3 (Farrugia, 1997); MERCURY (Macrae, <i>et al.</i>, 2006)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR-2004 (Burla, et al., 2005)'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker-Nonius Kappa CCD with APEXII detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0435
_diffrn_reflns_av_sigmaI/netI    0.0495
_diffrn_reflns_limit_h_max       38
_diffrn_reflns_limit_h_min       -38
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            13235
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.40
_exptl_absorpt_coefficient_mu    0.131
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.312
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3168
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.443
_refine_diff_density_min         -0.434
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     505
_refine_ls_number_reflns         6792
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0795
_refine_ls_R_factor_gt           0.0511
_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^)+(0.0244P)^2^+17.6940P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0976
_refine_ls_wR_factor_ref         0.1110
_reflns_number_gt                4974
_reflns_number_total             6792
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c0dt00766h.txt
_cod_data_source_block           o8h6
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7026832