3,8-Dimethyl-4-oxo-3,4-dihydroquinazoline-6-carbonitrile
Tian, Hai-Yan; Bi, Jian-Cong; Zhang, Hong-Xia; Zhang, Juan; Acta Crystallographica Section E 68 (2012) o1959–; doi:10.1107/S1600536812022088

data_2235160
_publ_section_title
;
 3,8-Dimethyl-4-oxo-3,4-dihydroquinazoline-6-carbonitrile
;
_journal_coeditor_code           LX2242
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1959
_journal_paper_doi               10.1107/S1600536812022088
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C11 H9 N3 O'
_chemical_formula_moiety         'C11 H9 N3 O'
_chemical_formula_sum            'C11 H9 N3 O'
_chemical_formula_weight         199.21
_chemical_name_systematic
;
3,8-Dimethyl-4-oxo-3,4-dihydroquinazoline-6-carbonitrile
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.0700(14)
_cell_length_b                   13.441(3)
_cell_length_c                   10.156(2)
_cell_measurement_reflns_used    8275
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.51
_cell_measurement_theta_min      3.03
_cell_volume                     965.1(3)
_computing_cell_refinement       'RAPID-AUTO (Rigaku, 1998)'
_computing_data_collection       'RAPID-AUTO (Rigaku, 1998)'
_computing_data_reduction        'CrystalClear (Rigaku/MSC, 2002)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_diffrn_measurement_method       '\w scan'
_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  0.0240
_diffrn_reflns_av_sigmaI/netI    0.0139
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            8874
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.03
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9770
_exptl_absorpt_correction_T_min  0.9596
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(ABSCOR; Higashi, 1995)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.371
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blcok
_exptl_crystal_F_000             416
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.215
_refine_diff_density_min         -0.202
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     138
_refine_ls_number_reflns         1162
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0375
_refine_ls_R_factor_gt           0.0347
_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^)+(0.0736P)^2^+0.0037P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0941
_refine_ls_wR_factor_ref         0.0954
_reflns_number_gt                1054
_reflns_number_total             1162
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            lx2242.cif
_cod_data_source_block           I
_cod_database_code               2235160
_cod_database_fobs_code          2235160