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_7216538
_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 H17 N3 O3 S'
_chemical_formula_sum            'C18 H17 N3 O3 S'
_chemical_formula_weight         355.41
_chemical_melting_point          467.5
_chemical_name_common            MMP
_chemical_name_systematic
; 
 3-6(-Methoxypyridin-3-yl)-5-(4-methylsulfonylphenyl)-
pyridine-2-amine 
;
_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                 105.4020(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.0063(3)
_cell_length_b                   16.8616(4)
_cell_length_c                   7.8007(5)
_cell_measurement_reflns_used    3628
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.43
_cell_measurement_theta_min      2.85
_cell_volume                     1776.12(13)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT 2000'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'POV-ray for Windows v3.6'
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2007)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2007)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Nonius Kappa CCD diffractometer'
_diffrn_measurement_method       'phi-, omega-scans of 1.0 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  0.0389
_diffrn_reflns_av_sigmaI/netI    0.0250
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            31335
_diffrn_reflns_theta_full        26.43
_diffrn_reflns_theta_max         26.43
_diffrn_reflns_theta_min         2.85
_exptl_absorpt_coefficient_mu    0.204
_exptl_absorpt_correction_T_max  0.9799
_exptl_absorpt_correction_T_min  0.9546
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2011)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.329
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.213
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         3628
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0585
_refine_ls_R_factor_gt           0.0388
_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^)+(0.0507P)^2^+0.6031P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0913
_refine_ls_wR_factor_ref         0.1012
_reflns_number_gt                2769
_reflns_number_total             3628
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce41798k.txt
_cod_data_source_block           d:\dyanne\2012\struct~1\007\sadabs\newp21c
_cod_depositor_comments
'Adding full bibliography for 7216538--7216544.cif.'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7216538