Two isomeric 10-methyl-8-phenyl-11-pyridyl-6,8-dihydro-5<i>H</i>-benzo[<i>f</i>]pyrazolo[3,4-<i>b</i>]quinolines: cyclic hydrogen-bonded tetramers <i>versus</i> isolated molecules
Portilla, Jaime; Serrano, Hugo; Cobo, Justo; Low, John N.; Glidewell, Christopher; Acta Crystallographica Section C 61 (2005) o490–o492; doi:10.1107/S0108270105021876

data_2015013
_publ_section_title
;Two isomeric
 10-methyl-8-phenyl-11-pyridyl-6,8-dihydro-5<i>H</i>-benzo[<i>f</i>]pyrazolo[3,4-<i>b</i>]quinolines:
 cyclic hydrogen-bonded tetramers <i>versus</i> isolated molecules
;
_journal_coeditor_code           GG1280
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o490
_journal_page_last               o492
_journal_paper_doi               10.1107/S0108270105021876
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C26 H20 N4'
_chemical_formula_moiety         'C26 H20 N4'
_chemical_formula_sum            'C26 H20 N4'
_chemical_formula_weight         388.46
_chemical_name_systematic
;
10-methyl-8-phenyl-11-(4-pyridyl)-6,8-dihydro-5H-
benzo[f]pyrazolo[3,4-b]quinoline
;
_space_group_IT_number           18
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.6288(8)
_cell_length_b                   19.1956(8)
_cell_length_c                   10.8885(3)
_cell_measurement_reflns_used    4952
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.53
_cell_measurement_theta_min      3.58
_cell_volume                     3893.6(3)
_computing_cell_refinement       'DENZO (Otwinowski & Minor, 1997) and COLLECT'
_computing_data_collection       'COLLECT (Hooft, 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 and SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution
'OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker Nonius KappaCCD area-detector'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker Nonius FR91 rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0745
_diffrn_reflns_av_sigmaI/netI    0.0802
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            25232
_diffrn_reflns_theta_full        27.53
_diffrn_reflns_theta_max         27.53
_diffrn_reflns_theta_min         3.58
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.992
_exptl_absorpt_correction_T_min  0.976
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.325
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       lath
_exptl_crystal_F_000             1632
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.306
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     543
_refine_ls_number_reflns         4952
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.1002
_refine_ls_R_factor_gt           0.0647
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0545P)^2^+3.0251P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1372
_refine_ls_wR_factor_ref         0.1519
_reflns_number_gt                3590
_reflns_number_total             4952
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            gg1280.cif
_cod_data_source_block           II
_cod_database_code               2015013
_cod_database_fobs_code          2015013