Diorganotin(IV) 2-pyridyl selenolates: synthesis, structures and their utility as molecular precursors for the preparation of tin selenide nanocrystals and thin films.
Sharma, Rakesh K.; Kedarnath, G.; Wadawale, Amey; Betty, C. A.; Vishwanadh, B.; Jain, Vimal K.; Dalton transactions (Cambridge, England : 2003) 41 (2012) 12129–12138; doi:10.1039/c2dt31197f

data_7030178
_publ_section_title
;
 Diorganotin(IV) 2-pyridyl selenolates: synthesis, structures and their
 utility as molecular precursors for the preparation of tin selenide
 nanocrystals and thin films.
;
_journal_issue                   39
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12129
_journal_page_last               12138
_journal_paper_doi               10.1039/c2dt31197f
_journal_volume                  41
_journal_year                    2012
_chemical_formula_sum            'C18 H26 N2 Se2 Sn'
_chemical_formula_weight         547.02
_chemical_name_systematic
;
?
;
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_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                 116.97(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   15.500(6)
_cell_length_b                   7.312(4)
_cell_length_c                   10.354(6)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      11.6
_cell_measurement_theta_min      7.9
_cell_volume                     1045.9(10)
_computing_cell_refinement       WinAFC
_computing_data_collection       WinAFC
_computing_data_reduction        CrystalStructure
_computing_molecular_graphics    'Ortep 3 for windows'
_computing_publication_material  'WinGX 1.70.01'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR92
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku AFC7S'
_diffrn_measurement_method       \w-2\q
_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  0.0387
_diffrn_reflns_av_sigmaI/netI    0.0763
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            1571
_diffrn_reflns_theta_full        27.53
_diffrn_reflns_theta_max         27.53
_diffrn_reflns_theta_min         2.77
_diffrn_standards_decay_%        -3.84
_diffrn_standards_interval_count 150
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    4.703
_exptl_absorpt_correction_T_max  0.6506
_exptl_absorpt_correction_T_min  0.2549
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North, Phillips & Mathews, 1968)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.737
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             532
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.691
_refine_diff_density_min         -1.243
_refine_diff_density_rms         0.149
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.70(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     109
_refine_ls_number_reflns         1307
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0779
_refine_ls_R_factor_gt           0.0377
_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^)+(0.0167P)^2^+2.7390P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0745
_refine_ls_wR_factor_ref         0.0886
_reflns_number_gt                974
_reflns_number_total             1307
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt31197f.txt
_cod_data_source_block           Sn(Sepy)2(But)2
_cod_original_sg_symbol_H-M      C2
_cod_database_code               7030178