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_4122234
_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 H8 Cl2 N6 O4'
_chemical_formula_weight         443.20
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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            4
_cell_length_a                   8.8228(7)
_cell_length_b                   12.0316(12)
_cell_length_c                   18.1669(16)
_cell_measurement_temperature    293(2)
_cell_volume                     1928.5(3)
_computing_cell_refinement       'RAPID AUTO (Rigaku, 2001)'
_computing_data_collection       'RAPID AUTO (Rigaku, 2001)'
_computing_data_reduction        'RAPID AUTO (Rigaku, 2001)'
_computing_molecular_graphics    'SHELXTL (Siemens, 1994)'
_computing_publication_material  'SHELXTL (Siemens, 1994)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID IP'
_diffrn_measurement_method       Oscillation
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.1270
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            4437
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.24
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.377
_exptl_absorpt_correction_T_max  0.9669
_exptl_absorpt_correction_T_min  0.8579
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'PSI scan'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.527
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             896
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.155
_refine_diff_density_min         -0.134
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(4)
_refine_ls_extinction_coef       0.0076(2)
_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   0.554
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         4437
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.554
_refine_ls_R_factor_all          0.0703
_refine_ls_R_factor_gt           0.0288
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0228
_refine_ls_wR_factor_ref         0.0256
_reflns_number_gt                2197
_reflns_number_total             4437
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0465092si20040613_051001.cif
_cod_data_source_block           sx113
_cod_depositor_comments
;
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 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'Empirical'
changed to 'empirical' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4122234