A stable enol in small ring systems: clear differentiation between penta- and tri-valency of phosphorus atoms.
Ionkin, Alex S; Marshall, William J; Fish, Brian M; Schiffhauer, Matthew F; McEwen, Charles N; Chemical communications (Cambridge, England)  (2008) 5432–5434; doi:10.1039/b809877h

data_7103468
_publ_section_title
;
 A stable enol in small ring systems: clear differentiation between
 penta- and tri-valency of phosphorus atoms.
;
_journal_issue                   42
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              5432
_journal_page_last               5434
_journal_paper_doi               10.1039/b809877h
_journal_year                    2008
_chemical_formula_sum            'C22 H39 O2 P'
_chemical_formula_weight         366.50
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   11.3952(6)
_cell_length_b                   11.9039(6)
_cell_length_c                   33.5993(17)
_cell_measurement_temperature    293(2)
_cell_volume                     4557.7(4)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_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  0.0417
_diffrn_reflns_av_sigmaI/netI    0.0177
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -44
_diffrn_reflns_number            78472
_diffrn_reflns_theta_full        28.27
_diffrn_reflns_theta_max         28.27
_diffrn_reflns_theta_min         2.16
_exptl_absorpt_coefficient_mu    0.132
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.068
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       iregblok
_exptl_crystal_F_000             1616
_exptl_crystal_size_max          0.420
_exptl_crystal_size_mid          0.370
_exptl_crystal_size_min          0.370
_refine_diff_density_max         0.502
_refine_diff_density_min         -0.243
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         5626
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0639
_refine_ls_R_factor_gt           0.0506
_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^)+(0.0730P)^2^+1.8779P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1330
_refine_ls_wR_factor_ref         0.1426
_reflns_number_gt                4542
_reflns_number_total             5626
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b809877h.txt
_cod_data_source_block           06027
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 
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_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               7103468