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_4133246
_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            'C26 H34'
_chemical_formula_weight         346.53
_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                 93.308(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.5417(6)
_cell_length_b                   6.9746(4)
_cell_length_c                   24.1738(13)
_cell_measurement_reflns_used    9526
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      74.53
_cell_measurement_theta_min      3.66
_cell_volume                     1942.72(18)
_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 1.000
_diffrn_measured_fraction_theta_max 0.999
_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  0.0457
_diffrn_reflns_av_unetI/netI     0.0208
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            70713
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         70.023
_diffrn_reflns_theta_min         3.663
_diffrn_source
'I\mS micro-focus sealed tube, multilayer optics'
_exptl_absorpt_coefficient_mu    0.486
_exptl_absorpt_correction_T_max  0.7538
_exptl_absorpt_correction_T_min  0.6312
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2009)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.185
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.478
_exptl_crystal_size_mid          0.165
_exptl_crystal_size_min          0.138
_refine_diff_density_max         0.707
_refine_diff_density_min         -0.258
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.150
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         3675
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.150
_refine_ls_R_factor_all          0.0631
_refine_ls_R_factor_gt           0.0604
_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^)+(0.0575P)^2^+1.7474P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1424
_refine_ls_wR_factor_ref         0.1440
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3517
_reflns_number_total             3675
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            schr15031.cif
_cod_data_source_block           schr15031
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4133246
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.801
_shelx_estimated_absorpt_t_max   0.936
_shelx_res_checksum              74655
_shelx_hkl_checksum              67629