Direct synthesis of the Janus-head ligand ((Me)Py)3Sn-Sn((Me)Py)3 using an unusual pyridyl-transfer reaction ((Me)Py = 6-methyl-2-pyridyl).
García-Rodríguez, Raúl; Wright, Dominic S.; Dalton transactions (Cambridge, England : 2003) 43 (2014) 14529–14532; doi:10.1039/c4dt02216e

data_7031926
_publ_section_title
;
 Direct synthesis of the Janus-head ligand ((Me)Py)3Sn-Sn((Me)Py)3 using
 an unusual pyridyl-transfer reaction ((Me)Py = 6-methyl-2-pyridyl).
;
_journal_issue                   39
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              14529
_journal_page_last               14532
_journal_paper_doi               10.1039/c4dt02216e
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         '2(C25 H20 Al Cl2 N5 Sn2),C4 H8 O'
_chemical_formula_sum            'C27 H24 Al Cl2 N5 O0.5 Sn2'
_chemical_formula_weight         761.77
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 90.455(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   16.4409(18)
_cell_length_b                   19.855(2)
_cell_length_c                   17.9265(18)
_cell_measurement_reflns_used    9938
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      48.56
_cell_measurement_theta_min      4.683
_cell_volume                     5851.6(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker GIS'
_computing_data_reduction        'Bruker SAINT'
_computing_publication_material  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al. 1994)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART X2S'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'doubly curved silicon crystal'
_diffrn_radiation_source         'micro-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1076
_diffrn_reflns_av_sigmaI/netI    0.0574
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            110543
_diffrn_reflns_theta_full        25.29
_diffrn_reflns_theta_max         25.29
_diffrn_reflns_theta_min         1.53
_exptl_absorpt_coefficient_mu    1.947
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.4599
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.729
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2976
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.31
_refine_diff_density_max         1.866
_refine_diff_density_min         -2.135
_refine_diff_density_rms         0.208
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.116
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     676
_refine_ls_number_reflns         10596
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.116
_refine_ls_R_factor_all          0.1186
_refine_ls_R_factor_gt           0.0752
_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^)+(0.0766P)^2^+97.2953P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1845
_refine_ls_wR_factor_ref         0.2140
_reflns_number_gt                7214
_reflns_number_total             10596
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4dt02216e2.cif
_cod_data_source_block           scan_0m
_cod_depositor_comments
'Adding full bibliography for 7031925--7031926.cif.'
_cod_original_cell_volume        5851.8(11)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7031926