Four 2-aryl-8,8-dimethyl-6,7,8,9-tetrahydropyrazolo[2,3-<i>a</i>]quinazolin-6-ones: isolated molecules, hydrogen-bonded dimers, and π-stacked chains of hydrogen-bonded dimers
Cruz, Silvia; Quiroga, Jairo; de la Torre, José M.; Cobo, Justo; Low, John N.; Glidewell, Christopher; Acta Crystallographica Section C 62 (2006) o364–o368; doi:10.1107/S0108270106017598

data_2015390
_publ_section_title
;Four
 2-aryl-8,8-dimethyl-6,7,8,9-tetrahydropyrazolo[2,3-<i>a</i>]quinazolin-6-ones:
 isolated molecules, hydrogen-bonded dimers, and \p-stacked chains of
 hydrogen-bonded dimers
;
_journal_coeditor_code           SK3026
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o364
_journal_page_last               o368
_journal_paper_doi               10.1107/S0108270106017598
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C19 H18 Cl N3 O'
_chemical_formula_moiety         'C19 H18 Cl N3 O'
_chemical_formula_sum            'C19 H18 Cl N3 O'
_chemical_formula_weight         339.81
_chemical_name_systematic
;
2-(4-Chlorophenyl)-5,8,8-trimethyl-6,7,8,9-
tetrahydropyrazolo[2,3-a]quinazolin-6-one
;
_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                100.992(10)
_cell_angle_beta                 93.118(15)
_cell_angle_gamma                110.524(9)
_cell_formula_units_Z            2
_cell_length_a                   8.5280(12)
_cell_length_b                   8.8610(14)
_cell_length_c                   11.7340(16)
_cell_measurement_reflns_used    3562
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.49
_cell_measurement_theta_min      5.04
_cell_volume                     808.1(2)
_computing_cell_refinement       'DIRAX/LSQ (Duisenberg <i>et al.</i>,  2000)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'EvalCCD (Duisenberg <i>et al.</i>,  2003)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement
'OSCAIL (McArdle, 2003) and SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution
'SIR97 (Altomare <i>et al.</i>,  1999) and WinGX (Farrugia, 1999)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.963
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker Nonius FR591 rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0376
_diffrn_reflns_av_sigmaI/netI    0.0341
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            17119
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         5.04
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.247
_exptl_absorpt_correction_T_max  0.952
_exptl_absorpt_correction_T_min  0.861
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'EvalCCD (Duisenberg <i>et al.</i>,  2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.397
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             356
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.388
_refine_diff_density_min         -0.417
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.076
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         3562
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.0853
_refine_ls_R_factor_gt           0.0517
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0677P)^2^+0.7985P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1238
_refine_ls_wR_factor_ref         0.1515
_reflns_number_gt                2542
_reflns_number_total             3562
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk3026.cif
_cod_data_source_block           I
_cod_database_code               2015390