Alternative solid-state forms of a potent antimalarial aminopyridine: X-ray crystallographic, thermal and solubility aspects
Cruickshank, Dyanne L.; Younis, Yassir; Njuguna, Nicholas M.; Ongarora, Dennis S. B.; Chibale, Kelly; Caira, Mino R.; CrystEngComm 16 (2014) 5781–; doi:10.1039/c3ce41798k

data_7216542
_publ_section_title
;
 Alternative solid-state forms of a potent antimalarial aminopyridine:
 X-ray crystallographic, thermal and solubility aspects
;
_journal_issue                   26
_journal_name_full               CrystEngComm
_journal_page_first              5781
_journal_paper_doi               10.1039/c3ce41798k
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety
'C18 H18 N3 O3 S1, C7 H3 N1 O3 S1, 2.48(H2 O1)'
_chemical_formula_sum            'C25 H26.97 N4 O8.48 S2'
_chemical_formula_weight         583.34
_chemical_melting_point          477
_chemical_name_systematic
; 
 3-6(-Methoxypyridin-3-yl)-5-(4-methylsulfonylphenyl)-
pyridine-2-amine. 2H-1lamda6,2-benzothiazol-1,1,3-trione
salt hydrate 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 99.4440(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   13.4221(6)
_cell_length_b                   16.7460(8)
_cell_length_c                   25.6251(12)
_cell_measurement_reflns_used    7072
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.33
_cell_measurement_theta_min      1.96
_cell_volume                     5681.6(5)
_computing_cell_refinement       'SAINT (Bruker, 2001)'
_computing_data_collection       'Bruker Apex2'
_computing_data_reduction        'Bruker SAINT, SADABS and XPREP'
_computing_molecular_graphics
;
Mercury (Macrae at al., 2006) and POV-RAY (Cason, 2003)
;
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXH-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker Kappa Apex II Duo diffractometer'
_diffrn_measurement_method       'phi- and omega-scans of 0.5 deg.'
_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  0.0349
_diffrn_reflns_av_sigmaI/netI    0.0211
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            51740
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         1.96
_exptl_absorpt_coefficient_mu    0.243
_exptl_absorpt_correction_T_max  0.9752
_exptl_absorpt_correction_T_min  0.9096
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.364
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             2439
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.887
_refine_diff_density_min         -0.359
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     368
_refine_ls_number_reflns         7072
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0625
_refine_ls_R_factor_gt           0.0514
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0683P)^2^+10.2423P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1365
_refine_ls_wR_factor_ref         0.1440
_reflns_number_gt                5869
_reflns_number_total             7072
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce41798k.txt
_cod_data_source_block           c:\dyanne~1\2013\007\s2sacc~1\c2c
_cod_depositor_comments
'Adding full bibliography for 7216538--7216544.cif.'
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7216542