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_1550058
_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_absolute_configuration unk
_chemical_formula_moiety         'C20 H26 N4 O2 Zn, 0.5(C7 H8)'
_chemical_formula_sum            'C23.5 H30 N4 O2 Zn'
_chemical_formula_weight         465.88
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2018-05-20 deposited with the CCDC.
2018-10-17 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 105.887(11)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.0930(10)
_cell_length_b                   14.8544(12)
_cell_length_c                   13.2064(15)
_cell_measurement_reflns_used    6497
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      22.5190
_cell_measurement_theta_min      3.8220
_cell_volume                     2281.7(4)
_computing_cell_refinement       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_molecular_graphics
'ORTEP3 for Windows - Farrugia, L. J. J. Appl. Crystallogr. 1997, 30, 565'
_computing_publication_material
;
 'WinGX publication routines, Farrugia, 
 L. J., J. Appl. Crystallogr., 1999, 32, 837-838
;
_computing_structure_refinement
;
 SHELXL-2016/6 (Sheldrick, 2016)
 Sheldrick GM (2008) Acta Crystallogr A64:112-122 and 
 C. B. H\"ubschle, G. M. Sheldrick and B. Dittrich
 ShelXle: a Qt graphical user interface for SHELXL
 J. Appl. Cryst., 44, (2011) 1281-1284.
;
_computing_structure_solution
; 
 SHELXT
 Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
;
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.01(19)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.0734
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.910
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'New Xcalibur, EosS2'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0649
_diffrn_reflns_av_unetI/netI     0.0940
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.910
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            33276
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.911
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.396
_diffrn_reflns_theta_min         3.208
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    1.103
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.92028
_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            colourless
_exptl_crystal_density_diffrn    1.356
_exptl_crystal_description       plate
_exptl_crystal_F_000             980
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.250
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.656
_refine_diff_density_min         -0.350
_refine_diff_density_rms         0.074
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.073(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     629
_refine_ls_number_reflns         9784
_refine_ls_number_restraints     100
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0824
_refine_ls_R_factor_gt           0.0538
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0260P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0725
_refine_ls_wR_factor_ref         0.0800
_reflns_Friedel_coverage         0.929
_reflns_Friedel_fraction_full    0.998
_reflns_Friedel_fraction_max     0.911
_reflns_number_gt                7458
_reflns_number_total             9784
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8py01369a2.cif
_cod_data_source_block           Zn_2_2
_cod_depositor_comments
;

2019-07-17
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel

 Adding full bibliography for 1550055--1550064.cif.
;
_cod_original_formula_moiety     '2(C20 H26 N4 O2 Zn), C7 H8'
_cod_original_formula_sum        'C47 H60 N8 O4 Zn2'
_cod_original_formula_units_Z    2
_cod_original_formula_weight     931.77
_cod_database_code               1550058
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.733
_shelx_estimated_absorpt_t_max   0.947
_oxdiff_exptl_absorpt_empirical_full_min 0.852
_oxdiff_exptl_absorpt_empirical_full_max 1.180
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_shelx_res_checksum              75091