Mono-oxo molybdenum(vi) and tungsten(vi) complexes bearing chelating aryloxides: synthesis, structure and ring opening polymerization of cyclic esters
Sun, Ziyue; Zhao, Yanxia; Prior, Timothy J.; Elsegood, Mark R. J.; Wang, Kuiyuan; Xing, Tian; Redshaw, Carl; Dalton Transactions  (2019) –; doi:10.1039/C8DT04566F

data_7048576
_publ_section_title
;
 Mono-oxo molybdenum(vi) and tungsten(vi) complexes bearing chelating
 aryloxides: synthesis, structure and ring opening polymerization of
 cyclic esters
;
_journal_name_full               'Dalton Transactions'
_journal_paper_doi               10.1039/C8DT04566F
_journal_year                    2019
_chemical_formula_moiety         'C60 H88 Mo O5, C6 H14'
_chemical_formula_sum            'C66 H102 Mo O5'
_chemical_formula_weight         1071.41
_chemical_name_systematic
; 
 ? 
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     heavy
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2018-08-10 deposited with the CCDC.
2018-12-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.320(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.4077(5)
_cell_length_b                   17.8693(8)
_cell_length_c                   27.6221(12)
_cell_measurement_reflns_used    17793
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.90
_cell_measurement_theta_min      2.15
_cell_volume                     6119.3(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.898
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0195
_diffrn_reflns_av_unetI/netI     0.0195
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.898
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            26161
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.898
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.941
_diffrn_reflns_theta_min         1.999
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.260
_exptl_absorpt_correction_T_max  0.962
_exptl_absorpt_correction_T_min  0.851
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v2.03, Sheldrick, G.M.'
_exptl_crystal_colour            'dark blue'
_exptl_crystal_density_diffrn    1.163
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2320
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: hexane'
_exptl_crystal_size_max          0.640
_exptl_crystal_size_mid          0.330
_exptl_crystal_size_min          0.150
_refine_diff_density_max         0.744
_refine_diff_density_min         -0.608
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.104
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         7274
_refine_ls_number_restraints     82
_refine_ls_restrained_S_all      1.109
_refine_ls_R_factor_all          0.0384
_refine_ls_R_factor_gt           0.0329
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0389P)^2^+8.1823P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0851
_refine_ls_wR_factor_ref         0.0880
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6574
_reflns_number_total             7274
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt04566f2.cif
_cod_data_source_block           1dothexane
_cod_database_code               7048576
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.851
_shelx_estimated_absorpt_t_max   0.962
_shelx_res_checksum              56041