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_4318843
_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_sum            'C44 H52 Br4 O4'
_chemical_formula_weight         964.50
_chemical_name_common            'Br4-nBu4Clx, 4'
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                102.216(2)
_cell_angle_beta                 91.643(2)
_cell_angle_gamma                93.967(2)
_cell_formula_units_Z            4
_cell_length_a                   12.2828(12)
_cell_length_b                   19.0305(18)
_cell_length_c                   19.1949(18)
_cell_measurement_temperature    223(2)
_cell_volume                     4370.3(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0340
_diffrn_reflns_av_sigmaI/netI    0.0300
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            64985
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    3.722
_exptl_absorpt_correction_T_max  0.3175
_exptl_absorpt_correction_T_min  0.2852
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.466
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1952
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.687
_refine_diff_density_min         -0.657
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     940
_refine_ls_number_reflns         15375
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.0697
_refine_ls_R_factor_gt           0.0419
_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^)+(0.0479P)^2^+5.5924P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0960
_refine_ls_wR_factor_ref         0.1104
_reflns_number_gt                10820
_reflns_number_total             15375
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic020446b_08.cif
_cod_data_source_block           4
_cod_database_code               4318843