Urea-Functionalized M4L6 Cage Receptors: Anion-Templated Self-Assembly and Selective Guest Exchange in Aqueous Solutions
Radu Custelcean; Peter V. Bonnesen; Nathan C. Duncan; Xiaohua Zhang; Lori A. Watson; Gary Van Berkel; Whitney B. Parson; Benjamin P. Hay; Journal of the American Chemical Society 134 (2012) 8525–8534; doi:10.1021/ja300677w

data_4117953
_publ_contact_author_email       custelceanr@ornl.gov
_publ_contact_author_name        'Radu Custelcean'
_publ_contact_author_phone       865-574-5018
_publ_section_title
;
 Urea-Functionalized M4L6 Cage Receptors: Anion-Templated Self-Assembly
 and Selective Guest Exchange in Aqueous Solutions
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8525
_journal_page_last               8534
_journal_paper_doi               10.1021/ja300677w
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C138 H120 N39 Ni4 O38 P'
_chemical_formula_weight         3198.54
_chemical_name_common            1b
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           146
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'R 3'
_symmetry_space_group_name_H-M   'R 3 :H'
_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                120.00
_cell_formula_units_Z            3
_cell_length_a                   27.5237(12)
_cell_length_b                   27.5237(12)
_cell_length_c                   19.5581(18)
_cell_measurement_temperature    173(2)
_cell_volume                     12831.3(14)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(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  0.0410
_diffrn_reflns_av_sigmaI/netI    0.0408
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            27182
_diffrn_reflns_theta_full        22.49
_diffrn_reflns_theta_max         22.49
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.523
_exptl_absorpt_correction_T_max  0.9072
_exptl_absorpt_correction_T_min  0.8893
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    1.242
_exptl_crystal_F_000             4956
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.781
_refine_diff_density_min         -0.485
_refine_diff_density_rms         0.132
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.263
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     651
_refine_ls_number_reflns         7466
_refine_ls_number_restraints     91
_refine_ls_restrained_S_all      1.260
_refine_ls_R_factor_all          0.1320
_refine_ls_R_factor_gt           0.1131
_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^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2811
_refine_ls_wR_factor_ref         0.3016
_reflns_number_gt                5842
_reflns_number_total             7466
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja300677w_si_002_3.cif
_cod_data_source_block           1b
_cod_original_sg_symbol_H-M      'R 3'
_cod_database_code               4117953