From the tetra(amino) phosphonium cation, [P(NHPh)4]+, to the tetra(imino) phosphate trianion, [P(NPh)4]3-, two-faced ligands that bind anions and cations.
Bickley, Jamie F.; Copsey, May C.; Jeffery, John C.; Leedham, Angela P.; Russell, Christopher A.; Stalke, Dietmar; Steiner, Alexander; Stey, Thomas; Zacchini, Stefano; Dalton transactions (Cambridge, England : 2003)  (2004) 989–995; doi:10.1039/b400798k

data_7014074
_publ_section_title
;
 From the tetra(amino) phosphonium cation, [P(NHPh)4]+, to the
 tetra(imino) phosphate trianion, [P(NPh)4]3-, two-faced ligands that
 bind anions and cations.
;
_journal_issue                   7
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              989
_journal_page_last               995
_journal_paper_doi               10.1039/b400798k
_journal_year                    2004
_chemical_formula_sum            'C40 H52 Cl Li4 N4 O4 P'
_chemical_formula_weight         747.04
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                85.131(4)
_cell_angle_beta                 80.666(4)
_cell_angle_gamma                80.165(5)
_cell_formula_units_Z            4
_cell_length_a                   11.554(3)
_cell_length_b                   16.624(4)
_cell_length_c                   21.304(5)
_cell_measurement_temperature    150(2)
_cell_volume                     3971.5(17)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEX CCD'
_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  0.0885
_diffrn_reflns_av_sigmaI/netI    0.2091
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            16440
_diffrn_reflns_theta_full        22.49
_diffrn_reflns_theta_max         22.49
_diffrn_reflns_theta_min         0.97
_exptl_absorpt_coefficient_mu    0.181
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.249
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1584
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.281
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.799
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     936
_refine_ls_number_reflns         10299
_refine_ls_number_restraints     3202
_refine_ls_restrained_S_all      0.940
_refine_ls_R_factor_all          0.1743
_refine_ls_R_factor_gt           0.0621
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0452P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1163
_refine_ls_wR_factor_ref         0.1463
_reflns_number_gt                4001
_reflns_number_total             10299
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b400798k.txt
_cod_data_source_block           5Li4Clthf4
_cod_original_cell_volume        3971.7(16)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7014074