Structural Landscape of Pure Enrofloxacin and Its Novel Salts: Enhanced Solubility for Better Pharmaceutical Applicability
Karanam, Maheswararao; Choudhury, Angshuman Roy; Crystal Growth & Design 13 (2013) 1626–; doi:10.1021/cg301831s

data_4507620
_publ_section_title
;
 Structural Landscape of Pure Enrofloxacin and Its Novel Salts: Enhanced
 Solubility for Better Pharmaceutical Applicability
;
_journal_issue                   4
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1626
_journal_paper_doi               10.1021/cg301831s
_journal_volume                  13
_journal_year                    2013
_chemical_formula_moiety         'C19 H22 F N3 O3'
_chemical_formula_sum            'C19 H22 F N3 O3'
_chemical_formula_weight         359.4
_chemical_name_systematic
;
 1-Cyclopropyl-7-(4-ethyl-1-piperazinyl)-6-fluoro-1,4-dihydro-4-oxo-3-
 quinolonecarboxylic acid
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_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_date             2012-12-12T23:13:17-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 133.7980(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.9345(4)
_cell_length_b                   6.8516(2)
_cell_length_c                   25.1563(5)
_cell_measurement_reflns_used    9816
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      60.079
_cell_measurement_theta_min      2.973
_cell_volume                     1733.56(8)
_computing_data_reduction        'SAINT v8.27A (Bruker, 2012)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
        J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
        J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
        SHELXL, G.M. Sheldrick, Acta Cryst.
        (2008). A64, 112-122
;
_computing_structure_solution
;
        SHELXS, G.M. Sheldrick, Acta Cryst.
        (2008). A64, 112-122
;
_diffrn_ambient_temperature      100.0
_diffrn_measured_fraction_theta_full 0.97
_diffrn_measured_fraction_theta_max 0.974
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0297
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            11883
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         1.69
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.752
_exptl_absorpt_correction_T_min  0.7054
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        SADABS-2012/1 (Bruker,2012) was used for absorption correction.
        wR2(int) was 0.0555 before and 0.0492 after correction.
        The Ratio of minimum to maximum transmission is 0.9380.
        The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_density_diffrn    1.377
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.258
_refine_diff_density_min         -0.23
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     323
_refine_ls_number_reflns         3462
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0353
_refine_ls_R_factor_gt           0.0324
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0593P)^2^+0.2431P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0912
_refine_ls_wR_factor_ref         0.0935
_reflns_number_gt                3138
_reflns_number_total             3462
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg301831s_si_002.cif
_cod_data_source_block           new
_cod_original_cell_volume        1733.55(8)
_cod_database_code               4507620