A General and High Yielding Fragment Coupling Synthesis of Heteroatom-Bridged Calixarenes and the Unprecedented Examples of Calixarene Cavity Fine-Tuned by Bridging Heteroatoms
Wang, Mei-Xiang; Yang, Hai-Bo; Journal of the American Chemical Society 126 (2004) 15412–; doi:10.1021/ja0465092

data_4122236
_publ_section_title
;
 A General and High Yielding Fragment Coupling Synthesis of
 Heteroatom-Bridged Calixarenes and the Unprecedented Examples of
 Calixarene Cavity Fine-Tuned by Bridging Heteroatoms
;
_journal_issue                   47
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15412
_journal_paper_doi               10.1021/ja0465092
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'C18 H10 Cl2 N8 O2'
_chemical_formula_weight         441.24
_space_group_IT_number           15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 95.009(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   21.2008(9)
_cell_length_b                   8.2713(3)
_cell_length_c                   21.3391(10)
_cell_measurement_temperature    293(2)
_cell_volume                     3727.7(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0209
_diffrn_reflns_av_sigmaI/netI    0.0308
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            7307
_diffrn_reflns_theta_full        27.41
_diffrn_reflns_theta_max         27.41
_diffrn_reflns_theta_min         2.60
_exptl_absorpt_coefficient_mu    0.384
_exptl_absorpt_correction_T_max  0.9375
_exptl_absorpt_correction_T_min  0.8677
_exptl_crystal_density_diffrn    1.572
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1792
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.505
_refine_diff_density_min         -0.555
_refine_diff_density_rms         0.047
_refine_ls_extinction_coef       0.0041(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.016
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         4217
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.016
_refine_ls_R_factor_all          0.0740
_refine_ls_R_factor_gt           0.0465
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0635P)^2^+2.4821P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1173
_refine_ls_wR_factor_ref         0.1313
_reflns_number_gt                2860
_reflns_number_total             4217
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0465092si20040613_051039.cif
_cod_data_source_block           sx53
_cod_depositor_comments
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The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 
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_cod_database_code               4122236