Synthesis and Characterization of Diametrically Substituted Tetra-O-n-butylcalix[4]arene Ligands and Their Chelated Complexes of Titanium, Molybdenum, and Palladium
Daniel R. Evans; Mingsheng Huang; James C. Fettinger; Tracie L. Williams; Inorganic Chemistry 41 (2002) 5986–6000; doi:10.1021/ic020446b

data_4318842
_publ_contact_author_email       de44@umail.umd.edu
_publ_contact_author_fax         +1-301-314-9121
_publ_contact_author_name        'Prof Daniel R. Evans'
_publ_contact_author_phone       +1-301-405-8436
_publ_section_title
;
 Synthesis and Characterization of Diametrically Substituted
 Tetra-O-n-butylcalix[4]arene Ligands and Their Chelated Complexes of
 Titanium, Molybdenum, and Palladium
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5986
_journal_page_last               6000
_journal_paper_doi               10.1021/ic020446b
_journal_volume                  41
_journal_year                    2002
_chemical_formula_moiety         'C44 H56 O4'
_chemical_formula_sum            'C44 H56 O4'
_chemical_formula_weight         648.924
_chemical_name_common            'nBu4Clx, 3'
_space_group_IT_number           88
_symmetry_cell_setting           tetragonal
_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     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   19.3059(7)
_cell_length_b                   19.3059(7)
_cell_length_c                   20.2010(10)
_cell_measurement_temperature    163(2)
_cell_measurement_theta_max      18.68
_cell_measurement_theta_min      2.51
_cell_volume                     7529.3(5)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      163(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker P4'
_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  0.0141
_diffrn_reflns_av_sigmaI/netI    0.0144
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1564
_diffrn_reflns_theta_full        18.68
_diffrn_reflns_theta_max         18.68
_diffrn_reflns_theta_min         2.51
_exptl_absorpt_coefficient_mu    0.036
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0
_exptl_absorpt_correction_type   'Semi-empirical via psi-scans'
_exptl_crystal_density_diffrn    0.574
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1416
_refine_diff_density_max         0.241
_refine_diff_density_min         -0.142
_refine_diff_density_rms         0.027
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     329
_refine_ls_number_reflns         1441
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0393
_refine_ls_R_factor_gt           0.0322
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0487P)^2^+6.4197P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0778
_refine_ls_wR_factor_ref         0.0826
_reflns_number_gt                1251
_reflns_number_total             1441
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic020446b_07.cif
_cod_data_source_block           3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

2020-12-03
Formula fixed more according to usual
chemical conventions and to be consistent with given Z.
                 miguel
;
_cod_original_sg_symbol_H-M      'I 41/a'
_cod_original_formula_sum        'C22 H29 O2'
_cod_database_code               4318842