Tuning a robust system: N,O zinc guanidine catalysts for the ROP of lactide.
Schäfer, Pascal M; McKeown, Paul; Fuchs, Martin; Rittinghaus, Ruth D.; Hermann, Alina; Henkel, Johanna; Seidel, Sebastian; Roitzheim, Christoph; Ksiazkiewicz, Agnieszka N.; Hoffmann, Alexander; Pich, Andrij; Jones, Matthew D.; Herres-Pawlis, Sonja; Dalton transactions (Cambridge, England : 2003) 48 (2019) 6071–6082; doi:10.1039/c8dt04938f

data_7048814
_publ_section_title
;
 Tuning a robust system: N,O zinc guanidine catalysts for the ROP of
 lactide.
;
_journal_issue                   18
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6071
_journal_page_last               6082
_journal_paper_doi               10.1039/c8dt04938f
_journal_volume                  48
_journal_year                    2019
_chemical_formula_moiety         'C15 H24 Cl2 N4 O2 Zn'
_chemical_formula_sum            'C15 H24 Cl2 N4 O2 Zn'
_chemical_formula_weight         428.65
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2018-11-22 deposited with the CCDC.
2019-01-29 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   15.010(2)
_cell_length_b                   12.9027(19)
_cell_length_c                   20.065(3)
_cell_measurement_reflns_used    2973
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      23.02
_cell_measurement_theta_min      2.71
_cell_volume                     3886.0(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'multilayer optics'
_diffrn_radiation_source         microsource
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0983
_diffrn_reflns_av_sigmaI/netI    0.0477
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            44769
_diffrn_reflns_theta_full        26.43
_diffrn_reflns_theta_max         26.43
_diffrn_reflns_theta_min         2.03
_exptl_absorpt_coefficient_mu    1.554
_exptl_absorpt_correction_T_max  0.7164
_exptl_absorpt_correction_T_min  0.5226
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS-2008/1 - Bruker AXS'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.465
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1776
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.500
_refine_diff_density_min         -0.453
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     224
_refine_ls_number_reflns         3991
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0490
_refine_ls_R_factor_gt           0.0359
_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^)+(0.0243P)^2^+5.2552P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0817
_refine_ls_wR_factor_ref         0.0877
_reflns_number_gt                3234
_reflns_number_total             3991
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c8dt04938f2.cif
_cod_data_source_block           C1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7048814--7048817.cif.
;
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               7048814