Bimetallic Calcium and Zinc Complexes with Bridged β-Diketiminate Ligands: Investigations on Epoxide/CO2Copolymerization
Piesik, Dirk F.-J.; Range, Sven; Harder, Sjoerd; Organometallics 27 (2008) 6178–; doi:10.1021/om800597f

data_4072114
_publ_contact_author             'Sjoerd Harder'
_publ_section_title
;
 Bimetallic Calcium and Zinc Complexes with Bridged \b-Diketiminate
 Ligands: Investigations on Epoxide/CO2Copolymerization
;
_journal_issue                   23
_journal_name_full               Organometallics
_journal_page_first              6178
_journal_paper_doi               10.1021/om800597f
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C52 H88 N6 Si4 Zn2'
_chemical_formula_weight         1040.38
_chemical_name_common            META-[ZnN(SiMe3)2]2
_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                 95.451(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.9191(8)
_cell_length_b                   35.169(3)
_cell_length_c                   18.4217(14)
_cell_measurement_temperature    193(2)
_cell_volume                     7042.2(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.1143
_diffrn_reflns_av_sigmaI/netI    0.1093
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       46
_diffrn_reflns_limit_k_min       -45
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            136020
_diffrn_reflns_theta_full        28.41
_diffrn_reflns_theta_max         28.41
_diffrn_reflns_theta_min         1.16
_exptl_absorpt_coefficient_mu    0.780
_exptl_crystal_density_diffrn    0.981
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2232
_platon_squeeze_details
;
;
_refine_diff_density_max         0.719
_refine_diff_density_min         -0.823
_refine_diff_density_rms         0.017
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     601
_refine_ls_number_reflns         17484
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.1253
_refine_ls_R_factor_gt           0.0708
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1467P)^2^+8.1407P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2085
_refine_ls_wR_factor_ref         0.2374
_reflns_number_gt                9114
_reflns_number_total             17484
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om800597f_si_001.cif
_cod_data_source_block           hasj149
_cod_original_cell_volume        7042.2(9)
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               4072114