Synthesis, Structure, and Unusual Reactivity of a Stable 3-(Oxazolidin-2-ylidene)thiophen-2-one.
Aitken, R. Alan; Harper, Andrew D.; Slawin, Alexandra M. Z.; The Journal of organic chemistry 81 (2016) 10527–10531; doi:10.1021/acs.joc.6b01309

data_4037029
_publ_section_title
;
 Synthesis, Structure, and Unusual Reactivity of a Stable
 3-(Oxazolidin-2-ylidene)thiophen-2-one.
;
_journal_issue                   21
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              10527
_journal_page_last               10531
_journal_paper_doi               10.1021/acs.joc.6b01309
_journal_volume                  81
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C9 H11 N O2 S'
_chemical_formula_sum            'C9 H11 N O2 S'
_chemical_formula_weight         197.25
_space_group_crystal_system      monoclinic
_space_group_IT_number           7
_space_group_name_Hall           'P -2yac'
_space_group_name_H-M_alt        'P 1 n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2015-11-24
_audit_creation_method           'by CrystalStructure 4.1'
_cell_angle_alpha                90.0000
_cell_angle_beta                 94.7605(10)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            2
_cell_length_a                   5.641(2)
_cell_length_b                   8.206(3)
_cell_length_c                   10.243(4)
_cell_measurement_reflns_used    1481
_cell_measurement_temperature    93
_cell_measurement_theta_max      27.40
_cell_measurement_theta_min      2.50
_cell_volume                     472.5(3)
_computing_cell_refinement       'CrystalClear-SM Expert 2.1 b45'
_computing_data_collection       'CrystalClear-SM Expert 2.1 b45 (Rigaku, 2015)'
_computing_data_reduction        'CrystalClear-SM Expert 2.1 b45'
_computing_molecular_graphics    'CrystalStructure 4.1'
_computing_publication_material  'CrystalStructure 4.1 (Rigaku, 2014)'
_computing_structure_refinement  'SHELXL2013 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT (Sheldrick, 2014)'
_diffrn_ambient_temperature      93
_diffrn_detector_area_resol_mean 5.814
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Rigaku XtaLAB P200'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0562
_diffrn_reflns_Laue_measured_fraction_full 0.990
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2661
_diffrn_reflns_point_group_measured_fraction_full 0.772
_diffrn_reflns_point_group_measured_fraction_max 0.771
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.269
_diffrn_reflns_theta_min         2.482
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.308
_exptl_absorpt_correction_T_max  0.997
_exptl_absorpt_correction_T_min  0.635
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.386
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             208.00
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.010
_refine_diff_density_max         0.43
_refine_diff_density_min         -0.29
_refine_ls_abs_structure_details
;
 Flack x determined using 435 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.11(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.997
_refine_ls_hydrogen_treatment    mixed
_refine_ls_number_parameters     124
_refine_ls_number_reflns         1326
_refine_ls_number_restraints     3
_refine_ls_R_factor_all          0.0419
_refine_ls_R_factor_gt           0.0410
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0582P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1034
_refine_ls_wR_factor_ref         0.1038
_reflns_number_gt                1270
_reflns_number_total             1326
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            jo6b01309_si_002.cif
_cod_data_source_block           4
_cod_database_code               4037029
_shelx_res_checksum              32373
_shelx_hkl_checksum              79985