Tert-butylamidinate tin(ii) complexes: high activity, single-site initiators for the controlled production of polylactide.
Nimitsiriwat, Nonsee; Gibson, Vernon C.; Marshall, Edward L.; White, Andrew J. P.; Dale, Sophie H.; Elsegood, Mark R. J.; Dalton transactions (Cambridge, England : 2003)  (2007) 4464–4471; doi:10.1039/b706663e

data_7005894
_publ_section_title
;
 Tert-butylamidinate tin(ii) complexes: high activity, single-site
 initiators for the controlled production of polylactide.
;
_journal_issue                   39
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4464
_journal_page_last               4471
_journal_paper_doi               10.1039/b706663e
_journal_year                    2007
_chemical_formula_sum            'C31 H49 N3 Sn'
_chemical_formula_weight         582.42
_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                99.131(2)
_cell_angle_beta                 107.283(2)
_cell_angle_gamma                106.213(2)
_cell_formula_units_Z            2
_cell_length_a                   10.0495(9)
_cell_length_b                   11.0334(10)
_cell_length_c                   15.5989(14)
_cell_measurement_reflns_used    8995
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.70
_cell_measurement_theta_min      2.19
_cell_volume                     1529.8(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.867
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0214
_diffrn_reflns_av_sigmaI/netI    0.0349
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            13187
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.87
_diffrn_reflns_theta_min         1.99
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.857
_exptl_absorpt_correction_T_max  0.935
_exptl_absorpt_correction_T_min  0.659
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, v2.03 Sheldrick, G.M. (2001)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.264
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             612
_exptl_crystal_size_max          0.53
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.060
_refine_diff_density_min         -1.175
_refine_diff_density_rms         0.072
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     329
_refine_ls_number_reflns         6970
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0331
_refine_ls_R_factor_gt           0.0280
_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^)+(0.0365P)^2^+0.4090P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0679
_refine_ls_wR_factor_ref         0.0704
_reflns_number_gt                6286
_reflns_number_total             6970
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b706663e.txt
_cod_data_source_block           4
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7005894