Tetrabromoterepthalic Acid in Designing Co-crystals and Salts: Modification of Optical Properties and Schottky Barrier Effect
Dey, Sanjoy Kumar; Saha, Rajat; Biswas, Susobhan; Layek, Animesh; Middya, Somnath; Steele, Ian M.; Fleck, Michel; Ray, Partha Pratim; Kumar, Sanjay; Crystal Growth & Design 14 (2014) 207–; doi:10.1021/cg4014009

data_4509941
_publ_section_title
;
 Tetrabromoterepthalic Acid in Designing Co-crystals and Salts:
 Modification of Optical Properties and Schottky Barrier Effect
;
_journal_issue                   1
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              207
_journal_paper_doi               10.1021/cg4014009
_journal_volume                  14
_journal_year                    2014
_chemical_formula_moiety         'C8 Br4 O4, 2(C5 H7 N2), 2(H2 O)'
_chemical_formula_sum            'C18 H18 Br4 N4 O6'
_chemical_formula_weight         706.00
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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                 101.565(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.2517(3)
_cell_length_b                   7.0646(2)
_cell_length_c                   18.7083(7)
_cell_measurement_reflns_used    2962
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.24
_cell_measurement_theta_min      2.22
_cell_volume                     1197.94(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_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  0.0623
_diffrn_reflns_av_sigmaI/netI    0.0863
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            12818
_diffrn_reflns_theta_full        28.24
_diffrn_reflns_theta_max         28.24
_diffrn_reflns_theta_min         2.22
_exptl_absorpt_coefficient_mu    6.760
_exptl_absorpt_correction_T_max  0.339
_exptl_absorpt_correction_T_min  0.241
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Sadabs(Sheldrick, 1996)'
_exptl_crystal_density_diffrn    1.957
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             684
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         1.184
_refine_diff_density_min         -0.777
_refine_diff_density_rms         0.135
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     148
_refine_ls_number_reflns         2962
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.1360
_refine_ls_R_factor_gt           0.0550
_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^)+(0.0648P)^2^+4.9048P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1419
_refine_ls_wR_factor_ref         0.1712
_reflns_number_gt                1493
_reflns_number_total             2962
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg4014009_si_005.cif
_cod_data_source_block           4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4509941