Multi-fold Sonogashira coupling: a new and convenient approach to obtain tetraalkynyl anthracenes with tunable photophysical properties.
Islam, Khadimul; Narjinari, Himani; Bisarya, Akshara; Kumar, Akshai; Organic & biomolecular chemistry 19 (2021) 9692–9704; doi:10.1039/d1ob01861b

data_7158366
_publ_section_title
;
 Multi-fold Sonogashira coupling: a new and convenient approach to obtain
 tetraalkynyl anthracenes with tunable photophysical properties.
;
_journal_issue                   44
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              9692
_journal_page_last               9704
_journal_paper_doi               10.1039/d1ob01861b
_journal_volume                  19
_journal_year                    2021
_chemical_formula_moiety         'C34 H42 Si4'
_chemical_formula_sum            'C34 H42 Si4'
_chemical_formula_weight         563.04
_chemical_name_common            TTMSEA
_chemical_name_systematic
(anthracene-2,6,9,10-tetrayltetrakis(ethyne-2,1-diyl))tetrakis(trimethylsilane)
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2021-03-17 deposited with the CCDC.	2021-10-19 downloaded from the CCDC.
;
_cell_angle_alpha                99.128(5)
_cell_angle_beta                 96.304(5)
_cell_angle_gamma                105.017(4)
_cell_formula_units_Z            1
_cell_length_a                   6.0741(8)
_cell_length_b                   11.2759(16)
_cell_length_c                   14.146(2)
_cell_measurement_reflns_used    26046
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.00
_cell_measurement_theta_min      1.91
_cell_volume                     912.3(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0645
_diffrn_reflns_av_sigmaI/netI    0.0354
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            26046
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.91
_exptl_absorpt_coefficient_mu    0.182
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.025
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             302
_exptl_crystal_preparation       Luminescent
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Dichloromethane'
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.143
_refine_diff_density_min         -0.179
_refine_diff_density_rms         0.031
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     178
_refine_ls_number_reflns         3212
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0662
_refine_ls_R_factor_gt           0.0436
_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^)+(0.0559P)^2^+0.1866P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1130
_refine_ls_wR_factor_ref         0.1232
_reflns_number_gt                2273
_reflns_number_total             3212
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d1ob01861b2.cif
_cod_data_source_block           adkhantms_0m_a
_cod_depositor_comments
'Adding full bibliography for 7158365--7158370.cif.'
_cod_database_code               7158366