2,2-Dimethyl-5-[(pyridin-2-ylamino)methylidene]-1,3-dioxane-4,6-dione
Shi, Jian-you; Li, Jin-qi; Tong, Rong-sheng; Lin, He; Lu, Chen; Acta Crystallographica Section E 67 (2011) o253–; doi:10.1107/S1600536810053250

data_2228941
_publ_section_title
;
 2,2-Dimethyl-5-[(pyridin-2-ylamino)methylidene]-1,3-dioxane-4,6-dione
;
_journal_coeditor_code           BH2327
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o253
_journal_paper_doi               10.1107/S1600536810053250
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C12 H12 N2 O4'
_chemical_formula_moiety         'C12 H12 N2 O4'
_chemical_formula_sum            'C12 H12 N2 O4'
_chemical_formula_weight         248.24
_chemical_name_systematic
;
2,2-Dimethyl-5-[(pyridin-2-ylamino)methylidene]-1,3-dioxane-4,6-dione
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.601(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.7344(10)
_cell_length_b                   13.9712(15)
_cell_length_c                   9.4744(11)
_cell_measurement_reflns_used    1780
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.1459
_cell_measurement_theta_min      3.0463
_cell_volume                     1152.4(2)
_computing_cell_refinement       'CrysAlis PRO (Oxford Diffraction, 2009)'
_computing_data_collection       'CrysAlis PRO (Oxford Diffraction, 2009)'
_computing_data_reduction        'CrysAlis PRO (Oxford Diffraction, 2009)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'OLEX2 (Dolomanov <i>et al.</i>, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.0874
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type
'Oxford Diffraction Xcalibur diffractometer with an Eos CCD detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0184
_diffrn_reflns_av_sigmaI/netI    0.0297
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            4873
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         3.38
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_T_max  1.0
_exptl_absorpt_correction_T_min  0.99713
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrysAlis PRO; Oxford Diffraction, 2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.431
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.141
_refine_diff_density_min         -0.140
_refine_ls_extinction_coef       0.0060(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     166
_refine_ls_number_reflns         2334
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0633
_refine_ls_R_factor_gt           0.0396
_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^)+(0.0383P)^2^+0.0655P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0831
_refine_ls_wR_factor_ref         0.0959
_reflns_number_gt                1659
_reflns_number_total             2334
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bh2327.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2228941
_cod_database_fobs_code          2228941