Ethyleneglycol tungsten complexes of calix[6 and 8]arenes: synthesis, characterization and ROP of ε-caprolactone.
Li, Yuanzhuo; Zhao, Ke-Qing; Feng, Chun; Elsegood, Mark R. J.; Prior, Timothy J.; Sun, Xinsen; Redshaw, Carl; Dalton transactions (Cambridge, England : 2003) 43 (2014) 13612–13619; doi:10.1039/c4dt01936a

data_7032357
_publ_section_title
;
 Ethyleneglycol tungsten complexes of calix[6 and 8]arenes: synthesis,
 characterization and ROP of \e-caprolactone.
;
_journal_issue                   36
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              13612
_journal_page_last               13619
_journal_paper_doi               10.1039/c4dt01936a
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         'C92 H116 O12 W2'
_chemical_formula_sum            'C92 H112 O12 W2'
_chemical_formula_weight         1777.52
_chemical_name_systematic
;
 ?
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 92.2260(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2109(2)
_cell_length_b                   34.2259(5)
_cell_length_c                   20.5984(3)
_cell_measurement_reflns_used    16537
_cell_measurement_temperature    135(2)
_cell_measurement_theta_max      2.730
_cell_measurement_theta_min      29.1656
_cell_volume                     8602.2(2)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
;
SHELXS, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_diffrn_ambient_temperature      135(2)
_diffrn_detector_area_resol_mean 16.0874
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Eos'
_diffrn_measurement_method       '\w scans'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0624
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       42
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            17552
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.89
_exptl_absorpt_coefficient_mu    2.730
_exptl_absorpt_correction_T_max  0.7719
_exptl_absorpt_correction_T_min  0.6112
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.

Tmax = 1; tmin = 0.79708
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.373
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3632
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_platon_squeeze_details
;
;
_refine_diff_density_max         1.329
_refine_diff_density_min         -0.872
_refine_diff_density_rms         0.118
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.067
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     979
_refine_ls_number_reflns         17552
_refine_ls_number_restraints     1140
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0527
_refine_ls_R_factor_gt           0.0387
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0240P)^2^+3.7056P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0738
_refine_ls_wR_factor_ref         0.0779
_reflns_number_gt                14374
_reflns_number_total             17552
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7031770
_cod_data_source_file            c4dt01936a2.cif
_cod_data_source_block           3
_cod_database_code               7032357