Probing the Delicate Balance between Pauli Repulsion and London Dispersion with Triphenylmethyl Derivatives.
Rösel, Sören; Becker, Jonathan; Allen, Wesley D.; Schreiner, Peter R.; Journal of the American Chemical Society 140 (2018) 14421–14432; doi:10.1021/jacs.8b09145

data_4133238
_publ_section_title
;
 Probing the Delicate Balance between Pauli Repulsion and London
 Dispersion with Triphenylmethyl Derivatives.
;
_journal_issue                   43
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14421
_journal_page_last               14432
_journal_paper_doi               10.1021/jacs.8b09145
_journal_volume                  140
_journal_year                    2018
_chemical_formula_sum            'C55 H76 O'
_chemical_formula_weight         753.15
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2016/6
_cell_angle_alpha                90
_cell_angle_beta                 94.7795(14)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   20.4549(5)
_cell_length_b                   19.4089(5)
_cell_length_c                   23.0083(6)
_cell_measurement_reflns_used    9702
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      78.78
_cell_measurement_theta_min      2.98
_cell_volume                     9102.7(4)
_computing_cell_refinement       'SAINT 8.38A (Bruker-AXS, 2017)'
_computing_data_collection       'APEX3 v2017.3-0 (Bruker-AXS, 2017)'
_computing_data_reduction        'SAINT 8.38A (Bruker-AXS, 2017)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT-2015 (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker PHOTON100'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0826
_diffrn_reflns_av_unetI/netI     0.0145
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            661205
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         74.492
_diffrn_reflns_theta_min         2.167
_diffrn_source
'I\mS micro-focus sealed tube, multilayer optics'
_exptl_absorpt_coefficient_mu    0.466
_exptl_absorpt_correction_T_max  0.7543
_exptl_absorpt_correction_T_min  0.6037
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.099
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3312
_exptl_crystal_size_max          0.449
_exptl_crystal_size_mid          0.420
_exptl_crystal_size_min          0.268
_refine_diff_density_max         0.773
_refine_diff_density_min         -0.832
_refine_diff_density_rms         0.062
_refine_ls_extinction_coef       0.00019(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2016/6 (Sheldrick 2016)'
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     2531
_refine_ls_number_reflns         18496
_refine_ls_number_restraints     28164
_refine_ls_restrained_S_all      1.272
_refine_ls_R_factor_all          0.1131
_refine_ls_R_factor_gt           0.1040
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1722P)^2^+8.3131P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2985
_refine_ls_wR_factor_ref         0.3092
_reflns_Friedel_coverage         0.000
_reflns_number_gt                16228
_reflns_number_total             18496
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            D18009.cif
_cod_data_source_block           D18009
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4133238
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.818
_shelx_estimated_absorpt_t_max   0.885
_shelx_res_checksum              82683
_shelx_hkl_checksum              87672