Unexpected formation of a thiazolo[3,2-<i>a</i>]pyridinium methide: a novel subclass of mesoionic compounds
Victor B. Rybakov; Alexander A. Bush; Sergei I. Troyanov; Eugene V. Babaev; Erhard Kemnitz; Acta Crystallographica Section E 62 (2006) o1673–o1675; doi:10.1107/S1600536806011135

data_2208990
_publ_section_title
;
 Unexpected formation of a thiazolo[3,2-<i>a</i>]pyridinium methide: a
 novel subclass of mesoionic compounds
;
_journal_coeditor_code           SJ2004
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1673
_journal_page_last               o1675
_journal_paper_doi               10.1107/S1600536806011135
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C19 H18 N2 O4 S2'
_chemical_formula_moiety         'C19 H18 N2 O4 S2'
_chemical_formula_sum            'C19 H18 N2 O4 S2'
_chemical_formula_weight         402.47
_chemical_melting_point          465
_chemical_name_systematic
;
(ethoxycarbonyl)[3-(ethoxycarbonyl)-1,3-thiazolo[3,2-a]pyridin-4-ium-2-
yl](2-thioxo-1,2-dihydropyridin-1-yl)methanide
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                82.66(3)
_cell_angle_beta                 80.06(3)
_cell_angle_gamma                84.11(3)
_cell_formula_units_Z            2
_cell_length_a                   6.8600(14)
_cell_length_b                   9.0710(18)
_cell_length_c                   14.634(3)
_cell_measurement_reflns_used    6851
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      31
_cell_measurement_theta_min      3.5
_cell_volume                     886.6(3)
_computing_cell_refinement       X-AREA
_computing_data_collection       'X-AREA (Stoe & Cie, 2002)'
_computing_data_reduction        'X-RED32 (Stoe & Cie, 2002)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Stoe IPDS'
_diffrn_measurement_method       \w
_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  0.0201
_diffrn_reflns_av_sigmaI/netI    0.0208
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            6851
_diffrn_reflns_theta_full        29.13
_diffrn_reflns_theta_max         29.13
_diffrn_reflns_theta_min         3.44
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.330
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            dark-red
_exptl_crystal_density_diffrn    1.508
_exptl_crystal_density_method    'Not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.461
_refine_diff_density_min         -0.289
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         4308
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0388
_refine_ls_R_factor_gt           0.0324
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0359P)^2^+0.5422P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0751
_refine_ls_wR_factor_ref         0.0773
_reflns_number_gt                3810
_reflns_number_total             4780
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sj2004.cif
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_hydrogens' value 'Geom' changed to
'geom' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_primary' value 'Direct' changed to
'direct' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_secondary' value 'Difmap' changed to
'difmap' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_hydrogen_treatment' value 'Constr' changed to
'constr' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_matrix_type' value 'Full' changed to 'full'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_weighting_scheme' value 'Calc' changed to 'calc'
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 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_hydrogens' value 'Geom' changed to
'geom' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_primary' value 'Direct' changed to
'direct' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_atom_sites_solution_secondary' value 'Difmap' changed
to 'difmap' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_hydrogen_treatment' value 'Constr' changed
to 'constr' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_matrix_type' value 'Full' changed to 'full'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_weighting_scheme' value 'Calc' changed to
'calc' 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_database_code               2208990
_cod_database_fobs_code          2208990