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_7048582
_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         'C52 H70 O6 W, C2 H3 N'
_chemical_formula_sum            'C54 H73 N O6 W'
_chemical_formula_weight         1015.98
_space_group_crystal_system      tetragonal
_space_group_IT_number           88
_space_group_name_Hall           '-I 4ad'
_space_group_name_H-M_alt        'I 41/a'
_symmetry_space_group_name_Hall  '-I 4ad'
_symmetry_space_group_name_H-M   'I 41/a :2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_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                 90
_cell_angle_gamma                90
_cell_formula_units_Z            16
_cell_length_a                   27.38560(10)
_cell_length_b                   27.38560(10)
_cell_length_c                   26.8480(2)
_cell_measurement_reflns_used    51025
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.5710
_cell_measurement_theta_min      3.3670
_cell_volume                     20135.22(18)
_computing_cell_refinement       'CrysAlisPro 1.171.39.9g (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.39.9g (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.39.9g (Rigaku OD, 2015)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB AFC12 (RCD3): Kappa single'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0411
_diffrn_reflns_av_unetI/netI     0.0191
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            118438
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.484
_diffrn_reflns_theta_min         3.035
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    2.343
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.51972
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
CrysAlisPro 1.171.39.9g (Rigaku Oxford Diffraction, 2015) 
Empirical absorption correction using spherical harmonics, 
 implemented in SCALE3 ABSPACK scaling algorithm. 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.341
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             8416
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: acetonitrile'
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.714
_refine_diff_density_min         -0.528
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.279
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     612
_refine_ls_number_reflns         11532
_refine_ls_number_restraints     176
_refine_ls_restrained_S_all      1.270
_refine_ls_R_factor_all          0.0349
_refine_ls_R_factor_gt           0.0321
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0053P)^2^+87.9493P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0612
_refine_ls_wR_factor_ref         0.0620
_reflns_Friedel_coverage         0.000
_reflns_number_gt                10974
_reflns_number_total             11532
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt04566f2.cif
_cod_data_source_block           9dotMeCN
_cod_original_cell_volume        20135.2(2)
_cod_database_code               7048582
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.652
_shelx_estimated_absorpt_t_max   0.799
_shelx_res_checksum              52316