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_7103469
_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 O3 P'
_chemical_formula_weight         382.50
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_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            16
_cell_length_a                   44.018(15)
_cell_length_b                   9.170(3)
_cell_length_c                   23.309(8)
_cell_measurement_temperature    293(2)
_cell_volume                     9409(5)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.2116
_diffrn_reflns_av_sigmaI/netI    0.1254
_diffrn_reflns_limit_h_max       51
_diffrn_reflns_limit_h_min       -51
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            61459
_diffrn_reflns_theta_full        24.61
_diffrn_reflns_theta_max         24.61
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    0.133
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.080
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       ireg.plate
_exptl_crystal_F_000             3360
_exptl_crystal_size_max          0.580
_exptl_crystal_size_mid          0.240
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.519
_refine_diff_density_min         -0.361
_refine_diff_density_rms         0.072
_refine_ls_extinction_coef       0.0033(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     521
_refine_ls_number_reflns         7841
_refine_ls_number_restraints     54
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.1738
_refine_ls_R_factor_gt           0.0818
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0933P)^2^+10.2144P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1841
_refine_ls_wR_factor_ref         0.2359
_reflns_number_gt                3881
_reflns_number_total             7841
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b809877h.txt
_cod_data_source_block           06275
_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 
;
_cod_original_sg_symbol_H-M      Pbcn
_cod_database_code               7103469