Lewis acid mediated elimination and rearrangement reactions of α-chlorosulfides derived from phenylthio-substituted 4,5-dihydrofuran-3(2H )-ones.
McCarthy, Daniel G.; Collins, Cornelius C.; O’Driscoll, Joan P.; Lawrence, Simon E.; Journal of the Chemical Society, Perkin Transactions 1  (1999) 3667–; doi:10.1039/a905169d

data_7213141
_publ_section_title
;
 Lewis acid mediated elimination and rearrangement reactions of
 \a-chlorosulfides derived from phenylthio-substituted
 4,5-dihydrofuran-3(2H&#x200A;)-ones.
;
_journal_issue                   24
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 1'
_journal_page_first              3667
_journal_paper_doi               10.1039/a905169d
_journal_year                    1999
_chemical_formula_moiety         'C20 H20 O4 S'
_chemical_formula_sum            'C20 H20 O4 S'
_chemical_formula_weight         356.42
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 93.33(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.9199(19)
_cell_length_b                   16.419(5)
_cell_length_c                   18.436(5)
_cell_measurement_reflns_used    22
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      14.85
_cell_measurement_theta_min      11.65
_cell_volume                     1788.9(9)
_computing_cell_refinement       'Nonius MACH3'
_computing_data_collection       'Nonius MACH3'
_computing_data_reduction        'maXus (Gilmore, 1998)'
_computing_molecular_graphics    'PLATON (Spek, 1998) '
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Nonius MACH3'
_diffrn_measurement_method       'omega/2theta scans'
_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  0.0269
_diffrn_reflns_av_sigmaI/netI    0.1610
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -2
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            6389
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         2.21
_diffrn_standards_decay_%        1.8
_diffrn_standards_interval_time  '3600 seconds'
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.202
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.323
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.192
_refine_diff_density_min         -0.199
_refine_diff_density_rms         0.049
_refine_ls_extinction_coef       0.0029(10)
_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   0.892
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         4044
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.892
_refine_ls_R_factor_all          0.1625
_refine_ls_R_factor_gt           0.0605
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0500P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1038
_refine_ls_wR_factor_ref         0.1221
_reflns_number_gt                1665
_reflns_number_total             4044
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            905169dsup1.cif
_cod_data_source_block           dgm9702
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0500P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0500P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7213141