A rational study of crystal engineering of supramolecular assemblies of 1,2,4,5-benzenetetracarboxylic acid.
Arora, Kapildev K.; Pedireddi, V. R.; The Journal of organic chemistry 68 (2003) 9177–9185; doi:10.1021/jo034434z

data_4029821
_publ_section_title
;
 A rational study of crystal engineering of supramolecular assemblies of
 1,2,4,5-benzenetetracarboxylic acid.
;
_journal_issue                   24
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              9177
_journal_page_last               9185
_journal_paper_doi               10.1021/jo034434z
_journal_volume                  68
_journal_year                    2003
_chemical_formula_moiety         (C10H6O8):2(C12H8N2)
_chemical_formula_sum            'C17 H11 N2 O4'
_chemical_formula_weight         307.28
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.68(1)
_cell_angle_beta                 102.41(1)
_cell_angle_gamma                106.30(1)
_cell_formula_units_Z            2
_cell_length_a                   7.084(1)
_cell_length_b                   7.253(1)
_cell_length_c                   13.933(2)
_cell_measurement_temperature    293(2)
_cell_volume                     669.06(17)
_computing_cell_refinement       SMART
_computing_data_collection       SMART
_computing_data_reduction        SAINTPLUS
_computing_structure_refinement  'SHELXTL (Sheldrick, 1997)'
_computing_structure_solution    'SHELXTL (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX CCD Area detector'
_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  0.0528
_diffrn_reflns_av_sigmaI/netI    0.0396
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            7055
_diffrn_reflns_theta_full        23.29
_diffrn_reflns_theta_max         23.29
_diffrn_reflns_theta_min         1.50
_exptl_absorpt_coefficient_mu    0.111
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.525
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Rectangular block'
_exptl_crystal_F_000             318
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.195
_refine_diff_density_min         -0.210
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     252
_refine_ls_number_reflns         1928
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0526
_refine_ls_R_factor_gt           0.0426
_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^)+(0.0550P)^2^+0.0259P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0925
_refine_ls_wR_factor_ref         0.0984
_reflns_number_gt                1654
_reflns_number_total             1928
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            3a.cif
_cod_data_source_block           3a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/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_cell_volume        669.1(2)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4029821