Mono-BHT heteroleptic magnesium complexes: synthesis, molecular structure and catalytic behavior in the ring-opening polymerization of cyclic esters
Nifant'ev, Ilya E.; Shlyahtin, Andrei V.; Bagrov, Vladimir V.; Minyaev, Mikhail M.; Churakov, Andrei; Karchevsky, Stanislav G.; Birin, Kirill P.; Ivchenko, Pavel V.; Dalton Trans.  (2017) –; doi:10.1039/C7DT02469J

data_7044042
_publ_section_title
;
 Mono-BHT heteroleptic magnesium complexes: synthesis, molecular structure
 and catalytic behavior in the ring-opening polymerization of cyclic
 esters
;
_journal_name_full               'Dalton Trans.'
_journal_paper_doi               10.1039/C7DT02469J
_journal_year                    2017
_chemical_formula_moiety         'C52 H76 Mg2 O6'
_chemical_formula_sum            'C52 H76 Mg2 O6'
_chemical_formula_weight         845.75
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2017-04-22 deposited with the CCDC.
2017-08-29 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                   20.396(3)
_cell_length_b                   44.791(7)
_cell_length_c                   11.0745(18)
_cell_measurement_reflns_used    9900
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      29.125
_cell_measurement_theta_min      2.278
_cell_volume                     10117(3)
_computing_cell_refinement       'SAINT (Bruker, 2008)'
_computing_data_collection       '<i>APEX2</i> (Bruker, 2008)'
_computing_data_reduction        'SAINT (Bruker, 2008)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART APEX II'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0567
_diffrn_reflns_av_sigmaI/netI    0.0316
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       54
_diffrn_reflns_limit_k_min       -54
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            84710
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.14
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9817
_exptl_absorpt_correction_T_min  0.9683
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.111
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             3680
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.831
_refine_diff_density_min         -0.692
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     555
_refine_ls_number_reflns         9556
_refine_ls_number_restraints     40
_refine_ls_restrained_S_all      1.067
_refine_ls_R_factor_all          0.0832
_refine_ls_R_factor_gt           0.0628
_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^)+(0.0781P)^2^+9.8472P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1644
_refine_ls_wR_factor_ref         0.1802
_reflns_number_gt                7271
_reflns_number_total             9556
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c7dt02469j2.cif
_cod_data_source_block           a_CCDC1
_cod_database_code               7044042