S-alkyl dithioformates as 1,3-dipolarophiles. Generation of C(2)-unsubstituted penems.
Sanchez, Sylvie; Bateson, John H.; O'Hanlon, Peter J; Gallagher, Timothy; Organic letters 6 (2004) 2781–2783; doi:10.1021/ol048991z

data_1507053
_publ_section_title
;
 S-alkyl dithioformates as 1,3-dipolarophiles. Generation of
 C(2)-unsubstituted penems.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              2781
_journal_page_last               2783
_journal_paper_doi               10.1021/ol048991z
_journal_volume                  6
_journal_year                    2004
_chemical_formula_moiety         'C14 H14 N2 O5 S2'
_chemical_formula_sum            'C14 H14 N2 O5 S2'
_chemical_formula_weight         354.39
_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                 94.917(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.2929(9)
_cell_length_b                   12.414(2)
_cell_length_c                   24.582(4)
_cell_measurement_reflns_used    1422
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24.0
_cell_measurement_theta_min      2.3
_cell_volume                     1609.2(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'CCD area detector'
_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  0.1023
_diffrn_reflns_av_sigmaI/netI    0.1465
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            10029
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         1.66
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.357
_exptl_absorpt_correction_T_max  0.983
_exptl_absorpt_correction_T_min  0.977
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1998)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.463
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.326
_refine_diff_density_min         -0.346
_refine_diff_density_rms         0.079
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.966
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3658
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.966
_refine_ls_R_factor_all          0.1516
_refine_ls_R_factor_gt           0.0551
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0390P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0940
_refine_ls_wR_factor_ref         0.1172
_reflns_number_gt                1811
_reflns_number_total             3658
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ol048991zsi20040601_123125.cif
_cod_data_source_block           sana
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P2(1)/n  '
_cod_database_code               1507053