Clathrates of TETROL: selective inclusion of methylcyclohexanones in their energetically unfavorable axial methyl conformations
B. Barton; M. R. Caira; E. C. Hosten; C. W. McCleland; S. Weitz; Chem.Commun. 50 (2014) 13353–; doi:10.1039/C4cc06826B

data_7115859
_publ_section_title
;
 Clathrates of TETROL: selective inclusion of methylcyclohexanones in
 their energetically unfavorable axial methyl conformations
;
_journal_name_full               Chem.Commun.
_journal_page_first              13353
_journal_paper_doi               10.1039/C4cc06826B
_journal_volume                  50
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C28 H26 O4, C7 H12 O'
_chemical_formula_sum            'C35 H38 O5'
_chemical_formula_weight         538.65
_chemical_melting_point          421
_chemical_name_systematic
; 
 (+)-(2R,3R)-tetraphenylbutane-1,2,3,4-tetraol/3-methylcyclohexanone (1:1) 
;
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 95.843(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.4493(6)
_cell_length_b                   8.2368(4)
_cell_length_c                   13.9466(7)
_cell_measurement_reflns_used    9960
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      28.31
_cell_measurement_theta_min      2.31
_cell_volume                     1422.69(12)
_computing_cell_refinement       'APEX2 v2011.4-1 (Bruker AXS)'
_computing_data_collection       'Bruker Instrument Service v2011.4.0.0'
_computing_data_reduction        'SAINT V7.68A (Bruker AXS, 2009)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0145
_diffrn_reflns_av_sigmaI/netI    0.0147
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            26618
_diffrn_reflns_theta_full        28.34
_diffrn_reflns_theta_max         28.34
_diffrn_reflns_theta_min         2.09
_diffrn_standards_number         26657
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9363
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.257
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             576
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: 3-methylcyclohexanone'
_exptl_crystal_size_max          0.533
_exptl_crystal_size_mid          0.469
_exptl_crystal_size_min          0.191
_refine_diff_density_max         0.283
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     399
_refine_ls_number_reflns         6823
_refine_ls_number_restraints     9
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0532
_refine_ls_R_factor_gt           0.0459
_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^)+(0.0762P)^2^+0.2746P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1269
_refine_ls_wR_factor_ref         0.1356
_reflns_number_gt                6031
_reflns_number_total             6823
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc06826b2.cif
_cod_data_source_block           n196
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7115859