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_4072112
_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            'C30 H52 Ca N3 O Si2'
_chemical_formula_weight         567.01
_chemical_name_common
{1,4-[(DIPP-NC(Me)CHC(Me)-N]2-C6H4}Ca2[N(TMS)2]2(THF)2
_space_group_IT_number           56
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   34.0276(9)
_cell_length_b                   10.3059(3)
_cell_length_c                   19.5596(5)
_cell_measurement_temperature    203(2)
_cell_volume                     6859.3(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0753
_diffrn_reflns_av_sigmaI/netI    0.0619
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -40
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            49558
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         1.20
_exptl_absorpt_coefficient_mu    0.277
_exptl_absorpt_correction_T_max  0.9728
_exptl_absorpt_correction_T_min  0.9214
_exptl_crystal_density_diffrn    1.098
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2472
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.253
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     474
_refine_ls_number_reflns         6281
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0897
_refine_ls_R_factor_gt           0.0495
_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^)+(0.0802P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1220
_refine_ls_wR_factor_ref         0.1470
_reflns_number_gt                4038
_reflns_number_total             6281
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om800597f_si_001.cif
_cod_data_source_block           hasj74
_cod_original_sg_symbol_H-M      Pccn
_cod_database_code               4072112