1,2-Bis(di-4-pyridylphosphino)ethane (d4pype)
Susan J. Berners-Price; Richard J. Bowen; Peter C. Healy; Acta Crystallographica Section E 60 (2004) o43–o44; doi:10.1107/S1600536803027405

data_2203130
_publ_section_title
;
 1,2-Bis(di-4-pyridylphosphino)ethane (d4pype)
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o43
_journal_page_last               o44
_journal_paper_doi               10.1107/S1600536803027405
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C22 H20 N4 P2'
_chemical_formula_moiety         'C22 H20 N4 P2'
_chemical_formula_sum            'C22 H20 N4 P2'
_chemical_formula_weight         402.37
_chemical_name_common            d4pype
_chemical_name_systematic
;
1,2-bis(di-4-pyridylphosphino)ethane
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_cell_angle_alpha                90
_cell_angle_beta                 108.33(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   14.073(6)
_cell_length_b                   8.228(2)
_cell_length_c                   9.200(2)
_cell_measurement_reflns_used    16
_cell_measurement_temperature    295
_cell_measurement_theta_max      17.1
_cell_measurement_theta_min      10.4
_cell_volume                     1011.2(6)
_computing_cell_refinement
'MSC/AFC7 Diffractometer Control Software for Windows'
_computing_data_collection
;
MSC/AFC7 Diffractometer Control Software for Windows
(Molecular Structure Corporation, 1999)
;
_computing_data_reduction
'TEXSAN for Windows (Molecular Structure Corporation, 1997-2001)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material
'TEXSAN for Windows and PLATON (Spek, 1980-2001)'
_computing_structure_refinement
'TEXSAN for Windows and SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'TEXSAN for Windows'
_diffrn_ambient_temperature      295
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'Rigaku AFC-7R'
_diffrn_measurement_method       \w-2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Rigaku rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0382
_diffrn_reflns_av_sigmaI/netI    0.1116
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2552
_diffrn_reflns_reduction_process ' ?'
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         2.91
_diffrn_standards_decay_%        0.86
_diffrn_standards_interval_count 150
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.230
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.797
_refine_diff_density_min         -0.257
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         2323
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.1526
_refine_ls_R_factor_gt           0.0522
_refine_ls_shift/su_max          0.016
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0879P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1439
_refine_ls_wR_factor_ref         0.1824
_reflns_number_gt                1170
_reflns_number_total             2323
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            wn6203.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2203130
_cod_database_fobs_code          2203130