Sterically crowded diphosphinomethane ligands: molecular structures, UV-photoelectron spectroscopy and a convenient general synthesis of tBu2PCH2PtBu2 and related species
Eisenträger, Frank; Göthlich, Alexander; Gruber, Irene; Heiss, Helmut; Kiener, Christoph A.; Krüger, Carl; Ulrich Notheis, J.; Rominger, Frank; Scherhag, Gunter; Schultz, Madeleine; Straub, Bernd F.; Volland, Martin A. O.; Hofmann, Peter; New Journal of Chemistry 27 (2003) 540–550; doi:10.1039/b210114a

data_7050490
_publ_section_title
;
 Sterically crowded diphosphinomethane ligands: molecular structures,
 UV-photoelectron spectroscopy and a convenient general synthesis of
 tBu2PCH2PtBu2 and related species
;
_journal_issue                   3
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              540
_journal_page_last               550
_journal_paper_doi               10.1039/b210114a
_journal_volume                  27
_journal_year                    2003
_chemical_compound_source        'see paper'
_chemical_formula_moiety         'C25 H46 P2'
_chemical_formula_sum            'C25 H46 P2'
_chemical_formula_weight         408.56
_chemical_name_common            dcpm
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_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
_cell_angle_alpha                98.210(10)
_cell_angle_beta                 96.840(10)
_cell_angle_gamma                105.230(10)
_cell_formula_units_Z            2
_cell_length_a                   9.718(2)
_cell_length_b                   10.423(2)
_cell_length_c                   12.7750(10)
_cell_measurement_reflns_used    75
_cell_measurement_temperature    100
_cell_measurement_theta_max      25.83
_cell_measurement_theta_min      9.09
_cell_volume                     1219.0(4)
_computing_cell_refinement       'EXPRESS / CAD4 software (Enraf-Nonius, 1995)'
_computing_data_collection       'EXPRESS / CAD4 software (Enraf-Nonius, 1995)'
_computing_data_reduction
'DATAP (Coppens,Leiserowitz & Rabinovich, 1965)'
_computing_molecular_graphics    'ORTEP (Johnson, 1976)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Enraf-Nonius CAD4'
_diffrn_measurement_method       '\w-2\q scan'
_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  0.0868
_diffrn_reflns_av_sigmaI/netI    0.0423
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            31999
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.63
_diffrn_standards_decay_%        5.66
_diffrn_standards_interval_time  30
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.186
_exptl_absorpt_correction_T_max  0
_exptl_absorpt_correction_T_min  0
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.113
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       plate
_exptl_crystal_F_000             452
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.592
_refine_diff_density_min         -0.519
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.182
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     428
_refine_ls_number_reflns         5611
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.182
_refine_ls_R_factor_all          0.0555
_refine_ls_R_factor_gt           0.0450
_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^)+(0.0897P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1294
_refine_ls_wR_factor_ref         0.1386
_reflns_number_gt                4742
_reflns_number_total             5611
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b210114a.txt
_cod_data_source_block           1312_dcpm_2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7050490