Syntheses, crystal structures, optical limiting properties, and DFT calculations of three thiophene-2-aldazine Schiff base derivatives
Ghazzali, Mohamed; Langer, Vratislav; Lopes, Cesar; Eriksson, Anders; Öhrström, Lars; New Journal of Chemistry 31 (2007) 1777–; doi:10.1039/b704009a

data_7052190
_publ_section_title
;
 Syntheses, crystal structures, optical limiting properties, and DFT
 calculations of three thiophene-2-aldazine Schiff base derivatives
;
_journal_issue                   10
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1777
_journal_paper_doi               10.1039/b704009a
_journal_volume                  31
_journal_year                    2007
_chemical_formula_moiety         'C10 H6 Br2 N2 S2'
_chemical_formula_sum            'C10 H6 Br2 N2 S2'
_chemical_formula_weight         378.11
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.797(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.6766(6)
_cell_length_b                   11.5253(6)
_cell_length_c                   10.2713(6)
_cell_measurement_reflns_used    3510
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.37
_cell_measurement_theta_min      2.61
_cell_volume                     1255.01(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Siemens SMART'
_diffrn_measurement_method       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  0.0942
_diffrn_reflns_av_sigmaI/netI    0.0720
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            10951
_diffrn_reflns_theta_full        25.37
_diffrn_reflns_theta_max         25.37
_diffrn_reflns_theta_min         2.61
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.764
_exptl_absorpt_correction_T_max  0.4974
_exptl_absorpt_correction_T_min  0.0503
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.001
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             728
_exptl_crystal_size_max          1.10
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.714
_refine_diff_density_min         -0.806
_refine_diff_density_rms         0.142
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     151
_refine_ls_number_reflns         2298
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0854
_refine_ls_R_factor_gt           0.0490
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0589P)^2^+1.0109P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1112
_refine_ls_wR_factor_ref         0.1259
_reflns_number_gt                1584
_reflns_number_total             2298
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b704009a.txt
_cod_data_source_block           g
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7052190