Hydrogen-bonded supramolecular structures in co-crystals of ??- or ??-diketone enols with 2,6-diaminopyridine or 2,4-diaminopyrimidine
Bertolasi, Valerio; Pretto, Loretta; Gilli, Paola; Ferretti, Valeria; Gilli, Gastone; New Journal of Chemistry 26 (2002) 1559–; doi:10.1039/b205705k

data_7050969
_publ_section_title
;
 Hydrogen-bonded supramolecular structures in co-crystals of ??- or
 ??-diketone enols with 2,6-diaminopyridine or 2,4-diaminopyrimidine
;
_journal_issue                   11
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1559
_journal_paper_doi               10.1039/b205705k
_journal_volume                  26
_journal_year                    2002
_chemical_formula_moiety         'C6 H8 O2, (C6 H7 O2)-, (C4 H7 N4)+, H2 O'
_chemical_formula_sum            'C16 H24 N4 O5'
_chemical_formula_weight         352.39
_chemical_name_systematic
;
1,3-cyclohexanedionate,  2,6-diaminopyridinium,
1,3-cyclohexanedione enol, hydrate
;
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                91.37(3)
_cell_angle_beta                 92.95(2)
_cell_angle_gamma                106.66(2)
_cell_formula_units_Z            2
_cell_length_a                   8.642(2)
_cell_length_b                   10.132(2)
_cell_length_c                   10.721(5)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    296
_cell_measurement_theta_max      14
_cell_measurement_theta_min      9
_cell_volume                     897.4(5)
_computing_cell_refinement       'CAD4 Enraf-Nonius, 1984'
_computing_data_collection       'CAD4 Enraf-Nonius, 1984'
_computing_data_reduction        'MolEN (Fair, Enraf-Nonius, 1990)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material
;
SHELXL-97 (Sheldrick, 1997), PARST (Nardelli, 1995)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      296
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Enraf-Nonius Cad-4'
_diffrn_measurement_method       \w/2\q
_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  0.013
_diffrn_reflns_av_sigmaI/netI    0.0212
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            4547
_diffrn_reflns_theta_full        27.96
_diffrn_reflns_theta_max         27.96
_diffrn_reflns_theta_min         2.10
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.304
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.460
_refine_diff_density_min         -0.207
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     327
_refine_ls_number_reflns         4319
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0854
_refine_ls_R_factor_gt           0.0540
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1007P)^2^+0.0400P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1587
_refine_ls_wR_factor_ref         0.1731
_reflns_number_gt                2759
_reflns_number_total             4319
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            b205705k.txt
_cod_data_source_block           (3)
_cod_original_formula_sum        'C16 H23 H N4 O5'
_cod_database_code               7050969