Synthon transferability probed with IR spectroscopy: cytosine salts as models for salts of lamivudine
Chakraborty, Shaunak; Ganguly, Somnath; Desiraju, Gautam R.; CrystEngComm 16 (2014) 4732–; doi:10.1039/c3ce42156b

data_7215922
_publ_section_title
;
 Synthon transferability probed with IR spectroscopy: cytosine salts as
 models for salts of lamivudine
;
_journal_issue                   22
_journal_name_full               CrystEngComm
_journal_page_first              4732
_journal_paper_doi               10.1039/c3ce42156b
_journal_volume                  16
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_moiety         '2(C8 H12 N3 O3 S), C2 O4'
_chemical_formula_sum            'C18 H24 N6 O10 S2'
_chemical_formula_weight         548.57
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.7021(15)
_cell_length_b                   9.134(2)
_cell_length_c                   37.734(10)
_cell_measurement_temperature    293(2)
_cell_volume                     2310.0(9)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.1426
_diffrn_reflns_av_sigmaI/netI    0.0971
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       49
_diffrn_reflns_limit_l_min       -49
_diffrn_reflns_number            20786
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         1.08
_exptl_absorpt_coefficient_mu    0.299
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.577
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1140
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.399
_refine_diff_density_min         -0.399
_refine_diff_density_rms         0.109
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.092
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     326
_refine_ls_number_reflns         5279
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0672
_refine_ls_R_factor_gt           0.0588
_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^)+(0.0616P)^2^+1.3062P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1465
_refine_ls_wR_factor_ref         0.1631
_reflns_number_gt                4720
_reflns_number_total             5279
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c3ce42156b.txt
_cod_data_source_block           datam
_cod_original_cell_volume        2309.9(10)
_cod_database_code               7215922