A chain of π-stacked molecules in 4-(2-chlorophenyl)pyrrolo[1,2-<i>a</i>]quinoxaline and a hydrogen-bonded sheet in (4<i>RS</i>)-4-(1,3-1,3-benzodioxol-6-yl)-4,5-dihydropyrrolo[1,2-<i>a</i>]quinoxaline
Castillo, Juan C.; Abonía, Rodrigo; Cobo, Justo; Glidewell, Christopher; Acta Crystallographica Section C 69 (2013) 544–548; doi:10.1107/S0108270113009098

data_2019016
_publ_section_title
;
 A chain of \p-stacked molecules in
 4-(2-chlorophenyl)pyrrolo[1,2-<i>a</i>]quinoxaline and a hydrogen-bonded
 sheet in
 (4<i>RS</i>)-4-(1,3-1,3-benzodioxol-6-yl)-4,5-dihydropyrrolo[1,2-<i>a</i>]quinoxaline
;
_journal_coeditor_code           YF3029
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              544
_journal_page_last               548
_journal_paper_doi               10.1107/S0108270113009098
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C18 H14 N2 O2'
_chemical_formula_moiety         'C18 H14 N2 O2'
_chemical_formula_sum            'C18 H14 N2 O2'
_chemical_formula_weight         290.31
_chemical_name_systematic
(<i>RS</i>)-4-(1,3-Benzodioxol-6-yl)-4,5-dihydropyrrolo[1,2-<i>a</i>]quinoxaline
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 104.017(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   26.590(3)
_cell_length_b                   6.2890(9)
_cell_length_c                   17.2655(19)
_cell_measurement_reflns_used    3225
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.56
_cell_volume                     2801.2(6)
_computing_cell_refinement       'DIRAX/LSQ (Duisenberg <i>et al.</i>, 2000)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction        'EVALCCD (Duisenberg <i>et al.</i>, 2003)'
_computing_molecular_graphics    'PLATON (Spek, 2009)'
_computing_publication_material
;
SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2004 (Burla <i>et al.</i>, 2005)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker 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  0.0461
_diffrn_reflns_av_sigmaI/netI    0.0330
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -34
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            23085
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.56
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.960
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.377
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.322
_refine_diff_density_min         -0.241
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.080
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         3225
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.080
_refine_ls_R_factor_all          0.0785
_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^)+(0.0376P)^2^+3.2029P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0999
_refine_ls_wR_factor_ref         0.1137
_reflns_number_gt                2350
_reflns_number_total             3225
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            yf3029.cif
_cod_data_source_block           II
_cod_original_cell_volume        2801.3(6)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2019016
_cod_database_fobs_code          2019016