Molecular packing and n-channel thin film transistors of chlorinated cyclobuta[1,2-b:3,4-b']diquinoxalines
Shuaijun Yang; Danqing Liu; Xiaomin Xu; Qian Miao; Chem.Commun. 51 (2015) 4275–; doi:10.1039/C5cc00537J

data_7116634
_publ_section_title
;
 Molecular packing and n-channel thin film transistors of chlorinated
 cyclobuta[1,2-b:3,4-b']diquinoxalines
;
_journal_name_full               Chem.Commun.
_journal_page_first              4275
_journal_paper_doi               10.1039/C5cc00537J
_journal_volume                  51
_journal_year                    2015
_chemical_formula_sum            'C16 H6 Cl2 N4'
_chemical_formula_weight         325.15
_chemical_name_systematic
; 
 2,8-dichloro-cyclobuta[1,2-b:3,4-b']diquinoxaline 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-01-16 deposited with the CCDC.
2015-02-03 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 99.974(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   3.8194(2)
_cell_length_b                   19.4986(8)
_cell_length_c                   8.9236(4)
_cell_measurement_reflns_used    55
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      15
_cell_measurement_theta_min      15
_cell_volume                     654.52(5)
_computing_cell_refinement       'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_computing_data_collection       'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_computing_data_reduction        'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_computing_molecular_graphics    'SIEMENS SHELXTL'
_computing_publication_material  'SIEMENS SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_diffrn_measurement_method       'PHI & OMEGA 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  0.0395
_diffrn_reflns_av_sigmaI/netI    0.0273
_diffrn_reflns_limit_h_max       3
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            8768
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         2.09
_exptl_absorpt_coefficient_mu    0.496
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6447
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.650
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             328
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.584
_refine_diff_density_min         -0.376
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.099
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     100
_refine_ls_number_reflns         1193
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.099
_refine_ls_R_factor_all          0.0786
_refine_ls_R_factor_gt           0.0496
_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^)+(0.0582P)^2^+0.9229P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1211
_refine_ls_wR_factor_ref         0.1446
_reflns_number_gt                881
_reflns_number_total             1193
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5cc00537j2.cif
_cod_data_source_block           dichloro-CBDQ
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7116634