Isostructurality and the conformational role of the 2′,3′-moieties in the diversity of lamivudine crystal forms probed in halide salts
Tenorio Clavijo, Juan Carlos; Guimarães, Freddy Fernandes; Ellena, Javier; Martins, Felipe Terra; CrystEngComm 17 (2015) 5187–; doi:10.1039/C4CE02373K

data_7219134
_publ_section_title
;
 Isostructurality and the conformational role of the
 2&#x2032;,3&#x2032;-moieties in the diversity of lamivudine crystal forms
 probed in halide salts
;
_journal_issue                   28
_journal_name_full               CrystEngComm
_journal_page_first              5187
_journal_paper_doi               10.1039/C4CE02373K
_journal_volume                  17
_journal_year                    2015
_chemical_absolute_configuration rm
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C8 H12 Br1 N3 O3 S1'
_chemical_formula_sum            'C8 H12 Br N3 O3 S'
_chemical_formula_weight         310.18
_chemical_name_common            Lamivudine_Hydrobromide
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4.3
_audit_creation_date             2014-10-09T17:03:00-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2014-10-29 deposited with the CCDC.
2014-12-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 103.897(5)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.689(5)
_cell_length_b                   12.288(5)
_cell_length_c                   8.419(5)
_cell_measurement_reflns_used    1094
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.35
_cell_measurement_theta_min      2.91
_cell_measurement_wavelength     0.71073
_cell_volume                     571.3(6)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV, 1997-2004)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-2012 (Sheldrick, 2012)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_orient_matrix_UB_11      -0.154806
_diffrn_orient_matrix_UB_12      0.005061
_diffrn_orient_matrix_UB_13      -0.08631
_diffrn_orient_matrix_UB_21      0.026339
_diffrn_orient_matrix_UB_22      0.079897
_diffrn_orient_matrix_UB_23      -0.010319
_diffrn_orient_matrix_UB_31      0.090198
_diffrn_orient_matrix_UB_32      -0.014644
_diffrn_orient_matrix_UB_33      -0.086126
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0444
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            3700
_diffrn_reflns_point_group_measured_fraction_full 0.975
_diffrn_reflns_point_group_measured_fraction_max 0.975
_diffrn_reflns_reduction_process
;
        Scaled and merged with Sortav
        R.H. Blessing, (1987) Cryst. Rev. 1, 3-58
        R.H. Blessing, (1989) J. Appl. Cryst. 22, 396-397
;
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.346
_diffrn_reflns_theta_min         2.993
_diffrn_source                   'Enraf Nonius FR590'
_exptl_absorpt_coefficient_mu    3.776
_exptl_absorpt_correction_T_max  0.906
_exptl_absorpt_correction_T_min  0.692
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
        P. Coppens, L. Leiserowitz, D Rabinovich, Acta Cryst.
        (1965), 18, 1035-1038
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.803
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.33
_refine_diff_density_min         -0.409
_refine_diff_density_rms         0.068
_refine_ls_abs_structure_details
;
 Flack x determined using 652 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.000(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.936
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     146
_refine_ls_number_reflns         2033
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.936
_refine_ls_R_factor_all          0.046
_refine_ls_R_factor_gt           0.0368
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 w=1/[\s^2^(Fo^2^)]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0611
_refine_ls_wR_factor_ref         0.0654
_reflns_number_gt                1783
_reflns_number_total             2033
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4ce02373k1.cif
_cod_data_source_block           shelx
_cod_depositor_comments
'Adding full bibliography for 7219133--7219137.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7219134
_shelx_estimated_absorpt_t_min   0.534
_shelx_estimated_absorpt_t_max   0.895