Switchable Ring-Contractive Extrusion Reactions of 2,5-Dihydro-1,4,5-thiadiazepine S-Oxides: Entries to Pyridazines or Pyrazoles.
Cheng, Bin; Li, Yuntong; Li, Hui; Zhang, Xinping; Wang, Taimin; Li, Yun; Zhai, Hongbin; The Journal of organic chemistry  (2019) –; doi:10.1021/acs.joc.9b03003

data_4037768
_publ_section_title
;
 Switchable Ring-Contractive Extrusion Reactions of
 2,5-Dihydro-1,4,5-thiadiazepine S-Oxides: Entries to Pyridazines or
 Pyrazoles.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.9b03003
_journal_year                    2019
_chemical_formula_moiety         'C14 H12 N2 O4'
_chemical_formula_sum            'C14 H12 N2 O4'
_chemical_formula_weight         272.26
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2018-12-17
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5337)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 108.200(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.261(4)
_cell_length_b                   7.494(2)
_cell_length_c                   11.699(3)
_cell_measurement_reflns_used    2395
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.942
_cell_measurement_theta_min      3.060
_cell_volume                     1271.0(6)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0223
_diffrn_reflns_av_unetI/netI     0.0269
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            6721
_diffrn_reflns_theta_full        26.02
_diffrn_reflns_theta_max         26.02
_diffrn_reflns_theta_min         1.40
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  0.7455
_exptl_absorpt_correction_T_min  0.6743
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2008/1 (Bruker,2008) was used for absorption correction. wR2(int) was 0.0714 before and 0.0385 after correction. The Ratio of minimum to maximum transmission is 0.9045. The \l/2 correction factor is 0.0015.'
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.423
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             568
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.152
_refine_diff_density_min         -0.179
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     183
_refine_ls_number_reflns         2498
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0497
_refine_ls_R_factor_gt           0.0387
_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^)+(0.0558P)^2^+0.2387P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1025
_refine_ls_wR_factor_ref         0.1117
_reflns_number_gt                1986
_reflns_number_total             2498
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo9b03003_si_002.cif
_cod_data_source_block           1
_cod_database_code               4037768
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C00A(H00A), C00E(H00E), C00F(H00F), C00G(H00G), C00H(H00H), C00I(H00I)
2.b Idealised Me refined as rotating group:
 C00J(H00B,H00C,H00D), C00K(H00J,H00K,H00L)
;
_olex2_submission_special_instructions 'No special instructions were received'