Symmetrical and unsymmetrical diphosphanes with diversified alkyl, aryl, and amino substituents.
Szynkiewicz, Natalia; Ponikiewski, Łukasz; Grubba, Rafał; Dalton transactions (Cambridge, England : 2003) 47 (2018) 16885–16894; doi:10.1039/c8dt03775b

data_7047983
_publ_section_title
;
 Symmetrical and unsymmetrical diphosphanes with diversified alkyl, aryl,
 and amino substituents.
;
_journal_issue                   47
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              16885
_journal_page_last               16894
_journal_paper_doi               10.1039/c8dt03775b
_journal_volume                  47
_journal_year                    2018
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C20 H37 N P2'
_chemical_formula_sum            'C20 H37 N P2'
_chemical_formula_weight         353.45
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      29
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     'iterative - e.g. charge flipping method'
_atom_sites_solution_secondary   'iterative - e.g. charge flipping method'
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4.3
_audit_creation_date             2018-08-28T20:39:33-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2018-09-12 deposited with the CCDC.
2018-11-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.3144(10)
_cell_length_b                   12.1120(9)
_cell_length_c                   12.1179(10)
_cell_measurement_reflns_used    4488
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      66.34
_cell_measurement_theta_min      3.65
_cell_measurement_wavelength     1.54186
_cell_volume                     2101.0(3)
_computing_cell_refinement
;
X-Area Recipe 1.33.0.0 (STOE, 2015)
;
_computing_data_collection
;
X-Area WinXpose 2.0.22.0 (STOE, 2016)
;
_computing_data_reduction
;
X-Area Integrate 1.72.0.0 (STOE, 2018)
X-Area X-Red32 1.63.4.0 (STOE, 2017) 
;
_computing_molecular_graphics    'Ortep for Windows (Farrugia, 2012)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL-2018/1 (Sheldrick, 2018)'
_computing_structure_solution    'SUPERFLIP (Palatinus & Chapuis,2007)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector                 'image plate (34 cm diameter)'
_diffrn_detector_area_resol_mean 6.67
_diffrn_detector_type            'STOE Imaging Plate'
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_details      ' 512 frames, detector distance = 50 mm'
_diffrn_measurement_device       '2-circle diffractometer'
_diffrn_measurement_device_type  'STOE IPDS 2T'
_diffrn_measurement_method       'rotation method, \w scans'
_diffrn_radiation_collimation    '0.6 mm diameter'
_diffrn_radiation_monochromator  'parabolic x-ray mirror'
_diffrn_radiation_polarisn_norm  270
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54186
_diffrn_reflns_av_R_equivalents  0.0811
_diffrn_reflns_av_unetI/netI     0.0496
_diffrn_reflns_Laue_measured_fraction_full 0.965
_diffrn_reflns_Laue_measured_fraction_max 0.965
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            9628
_diffrn_reflns_point_group_measured_fraction_full 0.88
_diffrn_reflns_point_group_measured_fraction_max 0.88
_diffrn_reflns_theta_full        65.998
_diffrn_reflns_theta_max         65.998
_diffrn_reflns_theta_min         3.649
_diffrn_source                   'GeniX Cu, 0.05 x 0.05 mm2 microfocus'
_diffrn_source_current           0.600
_diffrn_source_power             0.030
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    1.86
_exptl_absorpt_correction_T_max  0.6765
_exptl_absorpt_correction_T_min  0.4883
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
STOE X-Red32, absorption correction by Gaussian integration, analogous to
P. Coppens, "The Evaluation of Absorption and Extinction in Single-Crystal
Structure Analysis", published in
F. R. Ahmed (Editor), "Crystallographic Computing",
Munksgaard, Copenhagen (1970), 255 - 270
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.117
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.384
_refine_diff_density_min         -0.743
_refine_diff_density_rms         0.105
_refine_ls_abs_structure_details
;
 Classical Flack method preferred over Parsons because s.u. lower.
;
_refine_ls_abs_structure_Flack   0.10(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.107
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     208
_refine_ls_number_reflns         3235
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.107
_refine_ls_R_factor_all          0.0668
_refine_ls_R_factor_gt           0.0602
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1207P)^2^+1.2197P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.162
_refine_ls_wR_factor_ref         0.1785
_reflns_Friedel_coverage         0.729
_reflns_Friedel_fraction_full    0.784
_reflns_Friedel_fraction_max     0.784
_reflns_number_gt                2948
_reflns_number_total             3235
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt03775b2.cif
_cod_data_source_block           shelx_CCDC11
_cod_depositor_comments
'Adding full bibliography for 7047971--7047984.cif.'
_cod_database_code               7047983