Homoselenacalix[4]arenes: synthetic exploration and metallosupramolecular chemistry.
Thomas, Joice; Dobrzańska, Liliana; Van Hecke, Kristof; Sonawane, Mahendra P.; Robeyns, Koen; Van Meervelt, Luc; Woźniak, Krzysztof; Smet, Mario; Maes, Wouter; Dehaen, Wim; Organic & biomolecular chemistry 10 (2012) 6526–6536; doi:10.1039/c2ob25760b

data_7152522
_publ_section_title
;
 Homoselenacalix[4]arenes: synthetic exploration and metallosupramolecular
 chemistry.
;
_journal_issue                   32
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              6526
_journal_page_last               6536
_journal_paper_doi               10.1039/c2ob25760b
_journal_volume                  10
_journal_year                    2012
_chemical_formula_moiety         'C52 H72 O4 Se4, 2(C4 H8 O)'
_chemical_formula_sum            'C60 H88 O6 Se4'
_chemical_formula_weight         1221.14
_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                   28.310(4)
_cell_length_b                   28.310(4)
_cell_length_c                   14.618(3)
_cell_measurement_reflns_used    9805
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.679
_cell_measurement_theta_min      2.566
_cell_volume                     11716(3)
_computing_cell_refinement       CrysAlisRED
_computing_data_collection       CrysAlisCCD
_computing_data_reduction        CrysAlisRED
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  KM4CCD
_diffrn_measurement_method       'omega scan'
_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  0.0597
_diffrn_reflns_av_sigmaI/netI    0.0261
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            94873
_diffrn_reflns_theta_full        26.41
_diffrn_reflns_theta_max         26.41
_diffrn_reflns_theta_min         1.44
_exptl_absorpt_coefficient_mu    2.552
_exptl_absorpt_correction_T_max  0.8028
_exptl_absorpt_correction_T_min  0.4956
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.385
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             5056
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.09
_refine_diff_density_max         1.121
_refine_diff_density_min         -0.377
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     324
_refine_ls_number_reflns         5998
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.079
_refine_ls_R_factor_all          0.0539
_refine_ls_R_factor_gt           0.0364
_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^)+(0.0409P)^2^+35.2950P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0844
_refine_ls_wR_factor_ref         0.0928
_reflns_number_gt                4733
_reflns_number_total             5998
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob25760b.txt
_cod_data_source_block           14THF
_cod_original_sg_symbol_H-M      'I 41/a'
_cod_database_code               7152522