Molecular Co-Crystals of Carboxylic Acids. 22. The Adducts of Pyrazine-2,3-dicarboxylic Acid with 2-Aminobenzoic Acid (1:2) and 3-Aminobenzoic Acid (1:1 Dihydrate)
Smith, G.; Lynch, D. E.; Byriel, K. A.; Kennard, C. H. L.; Acta Crystallographica Section C 51 (1995) 2629–2633; doi:10.1107/S0108270195008092

data_2004279
_publ_section_title
;
 Molecular Co-Crystals of Carboxylic Acids. 22. The Adducts of
 Pyrazine-2,3-dicarboxylic Acid with 2-Aminobenzoic Acid (1:2) and
 3-Aminobenzoic Acid (1:1 Dihydrate)
;
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2629
_journal_page_last               2633
_journal_paper_doi               10.1107/S0108270195008092
_journal_volume                  51
_journal_year                    1995
_chemical_formula_sum            'C20 H18 N4 O8'
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_symmetry_space_group_name_H-M   'C 1 2/c 1'
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_cell_angle_gamma                90
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_cell_length_b                   7.6360(4)
_cell_length_c                   12.966(2)
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_cell_measurement_temperature    293(2)
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_cell_measurement_theta_min      6
_cell_volume                     2039.6(5)
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_computing_data_collection       'MolEN (Fair, 1990)'
_computing_data_reduction        'Xtal3.2 (Hall, Flack & Stewart, 1992)'
_computing_molecular_graphics    'PLATON92 (Spek, 1990)'
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1985)'
_diffrn_measurement_device       'Enraf-Nonius CAD-4'
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_diffrn_reflns_limit_h_min       -4
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_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_scheme
;                    1/[\s^2^(F~o~)^2^+(0.139P)^2^+3.55P] where
P = [max(F~o~^2^,0)+2(F~o~)^2^]/3
;
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