Highly active Mg(ii) and Zn(ii) complexes for the ring opening polymerisation of lactide
McKeown, Paul; McCormick, Strachan N.; Mahon, Mary F.; Jones, Matthew D.; Polymer Chemistry 9 (2018) 5339–; doi:10.1039/C8PY01369A

data_1550055
_publ_section_title
;
 Highly active Mg(ii) and Zn(ii) complexes for the ring opening
 polymerisation of lactide
;
_journal_issue                   44
_journal_name_full               'Polymer Chemistry'
_journal_page_first              5339
_journal_paper_doi               10.1039/C8PY01369A
_journal_volume                  9
_journal_year                    2018
_chemical_formula_sum            'C36 H58 N4 O2 Zn'
_chemical_formula_weight         644.23
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-05-20 deposited with the CCDC.
2018-10-17 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 104.339(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.3189(3)
_cell_length_b                   12.4391(3)
_cell_length_c                   17.5819(3)
_cell_measurement_reflns_used    2245
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      72.5760
_cell_measurement_theta_min      5.4570
_cell_volume                     3669.70(13)
_computing_cell_refinement       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    Sir2004
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.00(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.1150
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0439
_diffrn_reflns_av_unetI/netI     0.0180
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            82933
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         73.255
_diffrn_reflns_theta_min         3.207
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    1.184
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.87339
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.46 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.166
_exptl_crystal_description       block
_exptl_crystal_F_000             1392
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.832
_refine_diff_density_min         -0.552
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     433
_refine_ls_number_reflns         7370
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0384
_refine_ls_R_factor_gt           0.0349
_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^)+(0.0438P)^2^+2.3807P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0896
_refine_ls_wR_factor_ref         0.0922
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6780
_reflns_number_total             7370
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8py01369a2.cif
_cod_data_source_block           Zn_1__2
_cod_depositor_comments
'Adding full bibliography for 1550055--1550064.cif.'
_cod_database_code               1550055
_shelx_shelxl_version_number     2014/7
_oxdiff_exptl_absorpt_empirical_full_min 0.789
_oxdiff_exptl_absorpt_empirical_full_max 1.166
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_shelx_res_checksum              32270