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_4029819
_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):(C12H8N2):(H2O)
_chemical_formula_sum            'C22 H16 N2 O9'
_chemical_formula_weight         452.37
_chemical_name_systematic
; 
 ? 
;
_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                94.85(1)
_cell_angle_beta                 92.10(1)
_cell_angle_gamma                94.63(1)
_cell_formula_units_Z            2
_cell_length_a                   8.001(1)
_cell_length_b                   9.822(2)
_cell_length_c                   12.257(2)
_cell_measurement_temperature    293(2)
_cell_volume                     955.7(3)
_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 0.989
_diffrn_measured_fraction_theta_max 0.989
_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  0.0481
_diffrn_reflns_av_sigmaI/netI    0.0378
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            4124
_diffrn_reflns_theta_full        23.29
_diffrn_reflns_theta_max         23.29
_diffrn_reflns_theta_min         1.67
_exptl_absorpt_coefficient_mu    0.124
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.572
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Rectangular block'
_exptl_crystal_F_000             468
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.366
_refine_diff_density_min         -0.440
_refine_diff_density_rms         0.094
_refine_ls_extinction_coef       0.056(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     363
_refine_ls_number_reflns         2723
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0702
_refine_ls_R_factor_gt           0.0658
_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^)+(0.1433P)^2^+0.2253P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1704
_refine_ls_wR_factor_ref         0.1762
_reflns_number_gt                2460
_reflns_number_total             2723
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            2a.cif
_cod_data_source_block           2a
_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_sg_symbol_H-M      P-1
_cod_database_code               4029819