Anhydrates and/or hydrates in nitrate, sulphate and phosphate salts of 4-aminopyridine, (4-AP) and 3,4-diaminopyridine (3,4-DAP): the role of the water molecules in the hydrates
Hursthouse, Michael B.; Montis, Riccardo; Niitsoo, Liisa; Sarson, Jonathan; Threlfall, Terence L.; Asiri, Abdullah Mohamed; Khan, Salman Ahmad; Obaid, Abdullah Yousef; Al-Harbi, Laila Mohammad; CrystEngComm 16 (2014) 2205–; doi:10.1039/c3ce42471e

data_7213921
_publ_section_title
;
 Anhydrates and/or hydrates in nitrate, sulphate and phosphate salts of
 4-aminopyridine, (4-AP) and 3,4-diaminopyridine (3,4-DAP): the role of
 the water molecules in the hydrates
;
_journal_issue                   11
_journal_name_full               CrystEngComm
_journal_page_first              2205
_journal_paper_doi               10.1039/c3ce42471e
_journal_volume                  16
_journal_year                    2014
_chemical_formula_sum            'C5 H7 N3 O3'
_chemical_formula_weight         157.14
_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                 93.617(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.1718(6)
_cell_length_b                   6.9081(4)
_cell_length_c                   10.8243(7)
_cell_measurement_reflns_used    3350
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.5
_cell_volume                     684.46(7)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.0 r13 (Rigaku, 2011)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.0 r11 (Rigaku, 2011)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.0 r13 (Rigaku, 2011)
;
_computing_molecular_graphics
;
MERCURY  (Bruno, Cole, Edgington, Kessler, Macrae, McCabe, Pearson and 
Taylor, 2002)
;
_computing_publication_material  'WINGX (Farrugia, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SUPERFLIP (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type
;
Rigaku Saturn724+ (2x2 bin mode)
;
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0332
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            3555
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         3.50
_exptl_absorpt_coefficient_mu    0.127
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.847
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrystalClear-SM Expert 2.0 r13 (Rigaku, 2011)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.525
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             328
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.294
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.062
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     100
_refine_ls_number_reflns         1542
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0579
_refine_ls_R_factor_gt           0.0518
_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^)+(0.0093P)^2^+2.2953P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1411
_refine_ls_wR_factor_ref         0.1433
_reflns_number_gt                1377
_reflns_number_total             1542
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c3ce42471e.txt
_cod_data_source_block           2012ln0047a
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7213921