Alkaline earth metal complexes stabilized by amidine and guanidine ligands: synthesis, structure and their catalytic activity towards polymerization of rac-lactide.
Liu, Na; Liu, Bo; Cui, Dongmei; Dalton transactions (Cambridge, England : 2003) 47 (2018) 12623–12632; doi:10.1039/c8dt01434e

data_7047143
_publ_section_title
;
 Alkaline earth metal complexes stabilized by amidine and guanidine
 ligands: synthesis, structure and their catalytic activity towards
 polymerization of rac-lactide.
;
_journal_issue                   36
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12623
_journal_page_last               12632
_journal_paper_doi               10.1039/c8dt01434e
_journal_volume                  47
_journal_year                    2018
_chemical_formula_sum            'C53 H83 Ca N4 O2 Si2'
_chemical_formula_weight         904.49
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-07-24 deposited with the CCDC.
2018-07-26 downloaded from the CCDC.
;
_cell_angle_alpha                92.792(2)
_cell_angle_beta                 102.919(2)
_cell_angle_gamma                91.739(2)
_cell_formula_units_Z            2
_cell_length_a                   10.9102(10)
_cell_length_b                   13.5063(13)
_cell_length_c                   19.3671(19)
_cell_measurement_reflns_used    6571
_cell_measurement_temperature    184.5(2)
_cell_measurement_theta_max      26.097
_cell_measurement_theta_min      1.807
_cell_volume                     2775.8(5)
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      184.5(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.969
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0338
_diffrn_reflns_av_unetI/netI     0.0896
_diffrn_reflns_Laue_measured_fraction_full 0.981
_diffrn_reflns_Laue_measured_fraction_max 0.969
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            14670
_diffrn_reflns_point_group_measured_fraction_full 0.981
_diffrn_reflns_point_group_measured_fraction_max 0.969
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.097
_diffrn_reflns_theta_min         1.807
_exptl_absorpt_coefficient_mu    0.196
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.082
_exptl_crystal_description       block
_exptl_crystal_F_000             986
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.180
_exptl_crystal_size_min          0.150
_exptl_transmission_factor_max   0.788
_exptl_transmission_factor_min   0.729
_refine_diff_density_max         0.597
_refine_diff_density_min         -0.397
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     582
_refine_ls_number_reflns         10692
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.1286
_refine_ls_R_factor_gt           0.0789
_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^)+(0.1434P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2009
_refine_ls_wR_factor_ref         0.2577
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6571
_reflns_number_total             10692
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt01434e2.cif
_cod_data_source_block           complex3
_cod_depositor_comments
'Adding full bibliography for 7047143--7047148.cif.'
_cod_database_code               7047143
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.962
_shelx_estimated_absorpt_t_max   0.971
_shelx_res_checksum              11390