Zinc(II) Silsesquioxane Complexes and Their Application for the Ring-Opening Polymerization of rac-Lactide
Carlo Di Iulio; Matthew D. Jones; Mary F. Mahon; David C. Apperley; Inorganic Chemistry 49 (2010) 10232–10234; doi:10.1021/ic101809r

data_4317097
_publ_contact_author
;       Matthew D Jones
        University of Bath
        Department of Chemistry
        Bath, BA2 7AY
        United Kingdom
;
_publ_contact_author_email       mj205@bath.ac.uk
_publ_contact_author_fax         '# 44 1225 82 6231'
_publ_contact_author_phone       '# 44 1225 38 4908'
_publ_section_title
;
 Zinc(II) Silsesquioxane Complexes and Their Application for the
 Ring-Opening Polymerization of rac-Lactide
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              10232
_journal_page_last               10234
_journal_paper_doi               10.1021/ic101809r
_journal_volume                  49
_journal_year                    2010
_chemical_formula_sum            'C39 H77 N O13.5 Si8 Zn'
_chemical_formula_weight         1066.11
_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                67.289(3)
_cell_angle_beta                 79.143(2)
_cell_angle_gamma                78.634(3)
_cell_formula_units_Z            4
_cell_length_a                   16.5280(8)
_cell_length_b                   17.9250(6)
_cell_length_c                   22.1100(11)
_cell_measurement_reflns_used    137478
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.01
_cell_measurement_theta_min      3.53
_cell_volume                     5878.2(5)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV 1997-2004)'
_computing_data_reduction        'Denzo & Scalepack (Otwinowski, Minor 1997)'
_computing_molecular_graphics    'ORTEX (P.McArdle 1995)'
_computing_publication_material  'SHELXL-97/2 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97/2 (Sheldrick 1997)'
_computing_structure_solution
; 
 SIR97- Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C. , 
 Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R. 
 (1999) J. Appl. Cryst. 32, 115-119.
;
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  '95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0805
_diffrn_reflns_av_sigmaI/netI    0.0919
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            50834
_diffrn_reflns_theta_full        25.06
_diffrn_reflns_theta_max         25.06
_diffrn_reflns_theta_min         3.65
_exptl_absorpt_coefficient_mu    0.633
_exptl_absorpt_correction_T_max  0.9395
_exptl_absorpt_correction_T_min  0.8839
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995  
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.205
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2272
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.197
_refine_diff_density_min         -0.632
_refine_diff_density_rms         0.091
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1314
_refine_ls_number_reflns         20434
_refine_ls_number_restraints     28
_refine_ls_restrained_S_all      1.074
_refine_ls_R_factor_all          0.1394
_refine_ls_R_factor_gt           0.0751
_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^)+(0.0846P)^2^+17.9695P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1856
_refine_ls_wR_factor_ref         0.2262
_reflns_number_gt                12163
_reflns_number_total             20434
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ic101809r_si_003_1.cif
_cod_data_source_block           Zn4(1a)4(OMe)2(Me)2
_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_formula_sum        'C39 H77 N O13.50 Si8 Zn'
_cod_database_code               4317097