Formation of Double Cubanes [Sn7(NR)8] in the Reactions of Pyridyl and Pyrimidinyl Amines with Sn(NMe2)2: A Synthetic and Theoretical Study
David R. Armstrong; Francesca Benevelli; Andrew D. Bond; Neil Feeder; Eilis A. Harron; Alexander D. Hopkins; Mary McPartlin; David Moncrieff; David Sáez; Elsje A. Quadrelli; Anthony D. Woods; Dominic S. Wright; Inorganic Chemistry 41 (2002) 1492–1501; doi:10.1021/ic011090r

data_4317733
_publ_section_title
;
 Formation of Double Cubanes [Sn7(NR)8] in the Reactions of Pyridyl and
 Pyrimidinyl Amines with Sn(NMe2)2: A Synthetic and Theoretical Study
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1492
_journal_page_last               1501
_journal_paper_doi               10.1021/ic011090r
_journal_volume                  41
_journal_year                    2002
_chemical_formula_sum            'C48 H56 N24 O16 Sn7'
_chemical_formula_weight         2056.00
_chemical_name_systematic
;

  ?

;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                91.91(3)
_cell_angle_beta                 115.07(2)
_cell_angle_gamma                117.10(4)
_cell_formula_units_Z            1
_cell_length_a                   12.779(6)
_cell_length_b                   12.754(7)
_cell_length_c                   13.155(5)
_cell_measurement_temperature    198(2)
_cell_volume                     1659.3(17)
_computing_cell_refinement       'Bruker XPREP'
_computing_data_collection       'Bruker XPREP'
_computing_data_reduction        'Bruker XPREP'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      198(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       theta/2theta
_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  0.0272
_diffrn_reflns_av_sigmaI/netI    0.0460
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5309
_diffrn_reflns_theta_full        23.07
_diffrn_reflns_theta_max         23.07
_diffrn_reflns_theta_min         1.78
_diffrn_standards_decay_%        0.2
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.673
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.872
_exptl_absorpt_correction_type   semi-empirical
_exptl_absorpt_process_details   psi-scans
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.057
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             990
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.608
_refine_diff_density_min         -0.650
_refine_diff_density_rms         0.135
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.088
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     438
_refine_ls_number_reflns         4570
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_R_factor_all          0.0518
_refine_ls_R_factor_gt           0.0306
_refine_ls_shift/su_max          2.147
_refine_ls_shift/su_mean         0.161
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0094P)^2^+5.0478P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0533
_refine_ls_wR_factor_ref         0.0640
_reflns_number_gt                3431
_reflns_number_total             4570
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic011090r_1.cif
_cod_data_source_block           sy447
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_cell_volume        1659.3(13)
_cod_database_code               4317733