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_2015392
_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          'C24 H20 Cl N3 O'
_chemical_formula_moiety         'C24 H20 Cl N3 O'
_chemical_formula_sum            'C24 H20 Cl N3 O'
_chemical_formula_weight         401.88
_chemical_name_systematic
;
2-(4-Chlorophenyl)-8,8-dimethyl-5-phenyl-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                89.080(2)
_cell_angle_beta                 85.123(2)
_cell_angle_gamma                72.490(2)
_cell_formula_units_Z            2
_cell_length_a                   7.6778(2)
_cell_length_b                   8.1298(3)
_cell_length_c                   16.6417(5)
_cell_measurement_reflns_used    4513
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.91
_cell_volume                     986.99(5)
_computing_cell_refinement       'DENZO (Otwinowski & Minor, 1997) and COLLECT'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO and COLLECT'
_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
'SIR2004 (Burla <i>et al.</i>,  2005) and WinGX (Farrugia, 1999)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Nonius KappaCCD area-detector'
_diffrn_measurement_method       '\f and \w'
_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  0.0380
_diffrn_reflns_av_sigmaI/netI    0.0429
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            17614
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.91
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.214
_exptl_absorpt_correction_T_max  0.979
_exptl_absorpt_correction_T_min  0.927
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.352
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.176
_refine_diff_density_min         -0.264
_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     262
_refine_ls_number_reflns         4513
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0928
_refine_ls_R_factor_gt           0.0486
_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^)+(0.0639P)^2^+0.1379P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1132
_refine_ls_wR_factor_ref         0.1339
_reflns_number_gt                2799
_reflns_number_total             4513
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk3026.cif
_cod_data_source_block           III
_cod_original_cell_volume        987.06(5)
_cod_database_code               2015392