A rearrangement of 1,1-linked four-membered rings to bicyclic bridgehead five-membered rings: A phosphorus turn
Ionkin, Alex S.; Marshall, William J.; Fish, Brian M.; Dalton Transactions  (2009) 10574–10580; doi:10.1039/b916558d

data_7002931
_publ_section_title
;
 A rearrangement of 1,1-linked four-membered rings to bicyclic
 bridgehead five-membered rings: A phosphorus turn
;
_journal_issue                   47
_journal_name_full               'Dalton Transactions'
_journal_page_first              10574
_journal_page_last               10580
_journal_paper_doi               10.1039/b916558d
_journal_year                    2009
_chemical_formula_sum            'C28 H56 O2 P2 Si2'
_chemical_formula_weight         542.85
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 99.493(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.239(9)
_cell_length_b                   9.498(5)
_cell_length_c                   21.389(11)
_cell_measurement_temperature    173(2)
_cell_volume                     3454(3)
_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      173(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_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  0.0879
_diffrn_reflns_av_sigmaI/netI    0.0667
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            44249
_diffrn_reflns_theta_full        27.14
_diffrn_reflns_theta_max         27.14
_diffrn_reflns_theta_min         2.10
_exptl_absorpt_coefficient_mu    0.216
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.044
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       ireg.blok
_exptl_crystal_F_000             1192
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.360
_exptl_crystal_size_min          0.220
_refine_diff_density_max         0.366
_refine_diff_density_min         -0.306
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     333
_refine_ls_number_reflns         7448
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.1407
_refine_ls_R_factor_gt           0.0718
_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^)+(0.1038P)^2^+1.0538P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1830
_refine_ls_wR_factor_ref         0.2276
_reflns_number_gt                3732
_reflns_number_total             7448
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b916558d.txt
_cod_data_source_block           07081
_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 
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_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7002931