Synthesis of Triptycene-Based Molecular Rotors for Langmuir-Blodgett Monolayers.
Kaleta, Jiří; Kaletová, Eva; Císařová, Ivana; Teat, Simon J.; Michl, Josef; The Journal of organic chemistry 80 (2015) 10134–10150; doi:10.1021/acs.joc.5b01753

data_4031547
_publ_section_title
;
 Synthesis of Triptycene-Based Molecular Rotors for Langmuir-Blodgett
 Monolayers.
;
_journal_issue                   20
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              10134
_journal_page_last               10150
_journal_paper_doi               10.1021/acs.joc.5b01753
_journal_volume                  80
_journal_year                    2015
_chemical_compound_source        'synthesized by Dr. Jiri Kaleta'
_chemical_formula_moiety         'C29 H22 Br2 Si'
_chemical_formula_sum            'C29 H22 Br2 Si'
_chemical_formula_weight         558.38
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 93.758(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.7725(10)
_cell_length_b                   20.2392(13)
_cell_length_c                   8.0195(5)
_cell_measurement_reflns_used    5779
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.4259
_cell_measurement_theta_min      2.7371
_cell_volume                     2554.5(3)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker Instrument Service v2014.5.0.0'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0287
_diffrn_reflns_av_sigmaI/netI    0.0448
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            17211
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.64
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.235
_exptl_absorpt_correction_T_max  0.8100
_exptl_absorpt_correction_T_min  0.3329
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'SADABS V2014/3 (Bruker AXS Inc.)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.452
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1120
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.07
_refine_diff_density_max         1.263
_refine_diff_density_min         -0.906
_refine_diff_density_rms         0.099
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     292
_refine_ls_number_reflns         5866
_refine_ls_number_restraints     14
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0754
_refine_ls_R_factor_gt           0.0502
_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^)+(0.0661P)^2^+3.8642P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1290
_refine_ls_wR_factor_ref         0.1407
_reflns_number_gt                4273
_reflns_number_total             5866
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo5b01753_si_004.cif
_cod_data_source_block           JK557
_cod_depositor_comments
'Adding full bibliography for 4031540--4031548.cif.'
_cod_database_code               4031547