A molecular mechanics approach to mapping the conformational space of diaryl and triarylphosphines.
Fey, Natalie; Howell, James A. S.; Lovatt, Jonathan D.; Yates, Paul C.; Cunningham, Desmond; McArdle, Patrick; Gottlieb, Hugo E.; Coles, Simon J.; Dalton transactions (Cambridge, England : 2003)  (2006) 5464–5475; doi:10.1039/b610123b

data_7007784
_publ_section_title
;
 A molecular mechanics approach to mapping the conformational space of
 diaryl and triarylphosphines.
;
_journal_issue                   46
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5464
_journal_page_last               5475
_journal_paper_doi               10.1039/b610123b
_journal_year                    2006
_chemical_formula_sum            'C24 H27 O P'
_chemical_formula_weight         362.43
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 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                 101.973(16)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.398(2)
_cell_length_b                   8.274(2)
_cell_length_c                   17.451(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      18
_cell_measurement_theta_min      12
_cell_volume                     2033.7(7)
_computing_cell_refinement       'Nonius CAD4 software'
_computing_data_collection       'Nonius CAD4 software'
_computing_data_reduction        'XCAD (P.McArdle, 2000)'
_computing_molecular_graphics    'ORTEX (P.McArdle, 1995)'
_computing_publication_material  'SHELXL-97/2 (Sheldrick,1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.688
_diffrn_measured_fraction_theta_max 0.688
_diffrn_measurement_device_type  '4-circle diffractometer'
_diffrn_measurement_method       'scintillation counter'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0243
_diffrn_reflns_av_sigmaI/netI    0.0483
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -2
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            5244
_diffrn_reflns_theta_full        31.99
_diffrn_reflns_theta_max         31.99
_diffrn_reflns_theta_min         2.39
_exptl_absorpt_coefficient_mu    0.145
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.184
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Parallelepiped
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.304
_refine_diff_density_min         -0.160
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.971
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     343
_refine_ls_number_reflns         4853
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.971
_refine_ls_R_factor_all          0.0910
_refine_ls_R_factor_gt           0.0444
_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^)+(0.0795P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1190
_refine_ls_wR_factor_ref         0.1342
_reflns_number_gt                2770
_reflns_number_total             4853
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b610123b.txt
_cod_data_source_block           jh66
_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.

'_exptl_absorpt_correction_type' value 'None' changed to
'none' 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 
;
_cod_original_sg_symbol_H-M      P21/a
_cod_database_code               7007784