Polymorphism and tautomeric preference in fenobam and the utility of NLO response to detect polymorphic impurities
Sajesh P. Thomas; K. Nagarajan; T. N. Guru Row; Chem.Commun. 48 (2012) 10559–; doi:10.1039/c2cc34912d

data_7108480
_publ_section_title
;
 Polymorphism and tautomeric preference in fenobam and the utility of NLO
 response to detect polymorphic impurities
;
_journal_name_full               Chem.Commun.
_journal_page_first              10559
_journal_paper_doi               10.1039/c2cc34912d
_journal_volume                  48
_journal_year                    2012
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C11 H11 Cl N4 O2, H2 O'
_chemical_formula_sum            'C11 H13 Cl N4 O3'
_chemical_formula_weight         284.70
_chemical_name_common            'fenobam monohydrate'
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                92.620(16)
_cell_angle_beta                 92.898(17)
_cell_angle_gamma                114.618(19)
_cell_formula_units_Z            2
_cell_length_a                   7.7579(16)
_cell_length_b                   8.6433(16)
_cell_length_c                   10.536(2)
_cell_measurement_reflns_used    2255
_cell_measurement_temperature    293
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2.6
_cell_volume                     639.7(2)
_computing_cell_refinement       'SET4 (de Boer & Duisenberg, 1984)'
_computing_data_collection
'Locally modified CAD4 Software (Enraf-Nonius, 1989)'
_computing_data_reduction        'HELENA (Spek, 1997)'
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293
_diffrn_detector_area_resol_mean 18.4
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Oxford Xcalibur,Eos(Nova) CCD detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0322
_diffrn_reflns_av_sigmaI/netI    0.0491
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            4343
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.60
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.309
_exptl_absorpt_correction_T_max  0.955
_exptl_absorpt_correction_T_min  0.900
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlis RED (Oxford Diffraction,2009)'
_exptl_crystal_colour            ' colourless'
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             296
_exptl_crystal_size_max          0.350
_exptl_crystal_size_mid          0.250
_exptl_crystal_size_min          0.150
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.296
_refine_diff_density_rms         0.051
_refine_ls_extinction_coef       0.011(4)
_refine_ls_extinction_expression FC^*^=KFC[1+0.001XFC^2^\L^3^/SIN(2\Q)]^-1/4^
_refine_ls_extinction_method     shelxl
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         2255
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.078
_refine_ls_R_factor_all          0.0644
_refine_ls_R_factor_gt           0.0496
_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^)+(0.0676P)^2^+0.0303P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1272
_refine_ls_wR_factor_ref         0.1413
_reflns_number_gt                1730
_reflns_number_total             2255
_reflns_threshold_expression     >2\s(i)
_cod_data_source_file            c2cc34912d.txt
_cod_data_source_block           form1
_cod_database_code               7108480
_chemical                        'transforming point 353'