Dinuclear Zinc Salen Catalysts for the Ring Opening Copolymerization of Epoxides and Carbon Dioxide or Anhydrides.
Thevenon, Arnaud; Garden, Jennifer A.; White, Andrew J. P.; Williams, Charlotte K.; Inorganic chemistry 54 (2015) 11906–11915; doi:10.1021/acs.inorgchem.5b02233

data_4346845
_publ_section_title
;
 Dinuclear Zinc Salen Catalysts for the Ring Opening Copolymerization of
 Epoxides and Carbon Dioxide or Anhydrides.
;
_journal_issue                   24
_journal_name_full               'Inorganic chemistry'
_journal_page_first              11906
_journal_page_last               11915
_journal_paper_doi               10.1021/acs.inorgchem.5b02233
_journal_volume                  54
_journal_year                    2015
_chemical_formula_moiety         'C26 H30 N2 O8 Zn2, C H2 Cl2'
_chemical_formula_sum            'C27 H32 Cl2 N2 O8 Zn2'
_chemical_formula_weight         714.18
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL
_cell_angle_alpha                89.017(4)
_cell_angle_beta                 87.860(3)
_cell_angle_gamma                79.825(4)
_cell_formula_units_Z            2
_cell_length_a                   8.2671(3)
_cell_length_b                   12.7351(8)
_cell_length_c                   14.1980(6)
_cell_measurement_reflns_used    2842
_cell_measurement_temperature    173
_cell_measurement_theta_max      28.0860
_cell_measurement_theta_min      2.7250
_cell_volume                     1470.18(12)
_computing_cell_refinement       'CrysAlisPro, Agilent Technologies'
_computing_data_collection       'CrysAlisPro, Agilent Technologies'
_computing_data_reduction        'CrysAlisPro, Agilent Technologies'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'CIFTAB-2013 (Sheldrick, 2013)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 16.0382
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.802
_diffrn_measurement_device_type  'Agilent Xcalibur 3 E'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0215
_diffrn_reflns_av_unetI/netI     0.0458
_diffrn_reflns_Laue_measured_fraction_full 0.985
_diffrn_reflns_Laue_measured_fraction_max 0.802
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            8488
_diffrn_reflns_point_group_measured_fraction_full 0.985
_diffrn_reflns_point_group_measured_fraction_max 0.802
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.181
_diffrn_reflns_theta_min         2.505
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    1.864
_exptl_absorpt_correction_T_max  0.859
_exptl_absorpt_correction_T_min  0.482
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35 (release 13-08-2014 CrysAlis171 .NET)
(compiled Aug 13 2014,18:06:01)
Analytical numeric absorption correction using a multifaceted crystal
model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.613
_exptl_crystal_description       'blocky needles'
_exptl_crystal_F_000             732
_exptl_crystal_size_max          0.56
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.827
_refine_diff_density_min         -0.816
_refine_diff_density_rms         0.073
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     399
_refine_ls_number_reflns         5788
_refine_ls_number_restraints     48
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0516
_refine_ls_R_factor_gt           0.0379
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0362P)^2^+1.1345P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0837
_refine_ls_wR_factor_ref         0.0905
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4681
_reflns_number_total             5788
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ic5b02233_si_002.cif
_cod_data_source_block           (L1a)Zn2(OAc)2
_cod_original_cell_volume        1470.18(13)
_cod_database_code               4346845
_shelxl_version_number           2013-4