Supramolecular associates of para-aminobenzoic acid with N- and N,O-heterocyclic molecules
Moulton, Brian; Luisi, Brian S.; Fonari, Marina S.; Basok, Stepan S.; Ganin, Eduard V.; Kravtsov, Victor Ch.; New Journal of Chemistry 31 (2007) 561–; doi:10.1039/b618207k

data_7052143
_publ_section_title
;
 Supramolecular associates of para-aminobenzoic acid with N- and
 N,O-heterocyclic molecules
;
_journal_issue                   4
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              561
_journal_paper_doi               10.1039/b618207k
_journal_volume                  31
_journal_year                    2007
_chemical_formula_moiety         'C4 H12 N2, 2(C7 H6 N O2), 2(H2 O)'
_chemical_formula_sum            'C18 H28 N4 O6'
_chemical_formula_weight         396.44
_chemical_melting_point          462.6(5)
_chemical_name_common
'piperazinediium bis(4-aminobenzoate) dihydrate'
_chemical_name_systematic
;
piperazinediium bis(4-aminobenzoate) dihydrate
;
_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                 90.13(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.5739(13)
_cell_length_b                   11.597(2)
_cell_length_c                   12.604(3)
_cell_measurement_reflns_used    2883
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      27.91
_cell_measurement_theta_min      2.39
_cell_volume                     960.9(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_reflns_av_R_equivalents  0.0287
_diffrn_reflns_av_sigmaI/netI    0.0243
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            7319
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.39
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.737459
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS - Area Detector Absorption Correction'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.370
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             424
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.248
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.005
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     151
_refine_ls_number_reflns         1891
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.005
_refine_ls_R_factor_all          0.0420
_refine_ls_R_factor_gt           0.0373
_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^)+(0.0715P)^2^+0.2156P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1039
_refine_ls_wR_factor_ref         0.1073
_reflns_number_gt                1685
_reflns_number_total             1891
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b618207k.txt
_cod_data_source_block           msad
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '189-190 \oC' was changed to
'462.6(5)' - it was converted from degrees Celsius(C) to Kelvins(K),
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_sg_symbol_H-M      'P2(1)/c '
_cod_database_code               7052143