Stabilization of poly-iodides: structural influences of the cationic disulfides of 2-mercapto-3,4,5,6-tetrahydro-pyrimidine and 2-mercatpo-pyrimidine
Owczarzak, Anita M.; Kubicki, Maciej; Kourkoumelis, Nikolaos; Hadjikakou, Sotiris K.; RSC Advances 2 (2012) 2856–; doi:10.1039/c2ra00013j

data_7238553
_publ_section_title
;
 Stabilization of poly-iodides: structural influences of the cationic
 disulfides of 2-mercapto-3,4,5,6-tetrahydro-pyrimidine and
 2-mercatpo-pyrimidine
;
_journal_issue                   7
_journal_name_full               'RSC Advances'
_journal_page_first              2856
_journal_paper_doi               10.1039/c2ra00013j
_journal_volume                  2
_journal_year                    2012
_chemical_formula_sum            'C8 H16 I3 N4 S2'
_chemical_formula_weight         613.07
_space_group_IT_number           18
_space_group_name_Hall           'P 2 2ab'
_space_group_name_H-M_alt        'P 21 21 2'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P 21 21 2'
_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                   12.21180(10)
_cell_length_b                   25.3633(2)
_cell_length_c                   5.69180(10)
_cell_measurement_reflns_used    12527
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.8990
_cell_measurement_theta_min      2.9230
_cell_volume                     1762.93(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.1544
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Xcalibur, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0770
_diffrn_reflns_av_sigmaI/netI    0.0428
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            7941
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.60
_diffrn_reflns_theta_min         1.61
_exptl_absorpt_coefficient_mu    5.544
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.46184
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.42 (release 29-05-2009 CrysAlis171 .NET)
(compiled May 29 2009,17:40:42)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    2.310
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1132
_exptl_crystal_size_max          0.6
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         2.576
_refine_diff_density_min         -1.576
_refine_diff_density_rms         0.284
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.97(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     154
_refine_ls_number_reflns         3330
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0636
_refine_ls_R_factor_gt           0.0624
_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^)+(0.1322P)^2^+7.3374P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1751
_refine_ls_wR_factor_ref         0.1764
_reflns_number_gt                3215
_reflns_number_total             3330
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ra00013j.txt
_cod_data_source_block           thpmthi
_cod_original_sg_symbol_H-M      P21212
_cod_database_code               7238553