Molecular Recognition of Trigonal Oxyanions Using a Ditopic Salt Receptor: Evidence for Anisotropic Shielding Surface around Nitrate Anion
Joseph M. Mahoney; Kenneth A. Stucker; Hua Jiang; Ian Carmichael; Nicole R. Brinkmann; Alicia M. Beatty; Bruce C. Noll; Bradley D. Smith; Journal of the American Chemical Society 127 (2005) 2922–2928; doi:10.1021/ja0440295

data_4111492
_publ_section_title
;
 Molecular Recognition of Trigonal Oxyanions Using a Ditopic Salt
 Receptor: Evidence for Anisotropic Shielding Surface around Nitrate Anion
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2922
_journal_page_last               2928
_journal_paper_doi               10.1021/ja0440295
_journal_volume                  127
_journal_year                    2005
_chemical_formula_sum            'C38 H54 Li N5 O11'
_chemical_formula_weight         763.80
_chemical_name_systematic
; 
 ? 
;
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_symmetry_space_group_name_Hall  '-P 1'
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_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
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_cell_angle_beta                 79.170(4)
_cell_angle_gamma                76.860(4)
_cell_formula_units_Z            2
_cell_length_a                   10.785(2)
_cell_length_b                   13.577(3)
_cell_length_c                   14.016(3)
_cell_measurement_reflns_used    6444
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.37
_cell_measurement_theta_min      2.21
_cell_volume                     1963.0(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0452
_diffrn_reflns_av_sigmaI/netI    0.0997
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            15480
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.13
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7085
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.292
_exptl_crystal_description       'rect. prism'
_exptl_crystal_F_000             816
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.824
_refine_diff_density_min         -0.580
_refine_diff_density_rms         0.105
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         6839
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.1448
_refine_ls_R_factor_gt           0.1088
_refine_ls_shift/su_max          0.160
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1734P)^2^+2.4212P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2911
_refine_ls_wR_factor_ref         0.3381
_reflns_number_gt                4359
_reflns_number_total             6839
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0440295si20040930_061228.cif
_cod_data_source_block           bds1002m
_cod_original_cell_volume        1962.8(8)
_cod_database_code               4111492