Photophysical property trends for a homologous series of bis-ethynyl-substituted benzochalcogendiazoles
Coombs, Benjamin A.; Lindner, Benjamin D.; Edkins, Robert M.; Rominger, Frank; Beeby, Andrew; Bunz, Uwe H. F.; New Journal of Chemistry 36 (2012) 550–; doi:10.1039/c2nj20847d

data_7052850
_publ_section_title
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 Photophysical property trends for a homologous series of
 bis-ethynyl-substituted benzochalcogendiazoles
;
_journal_issue                   3
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              550
_journal_paper_doi               10.1039/c2nj20847d
_journal_volume                  36
_journal_year                    2012
_chemical_formula_sum            'C28 H44 N2 O Si2'
_chemical_formula_weight         480.83
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.703(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.8274(3)
_cell_length_b                   15.2591(3)
_cell_length_c                   14.0991(3)
_cell_measurement_reflns_used    4466
_cell_measurement_temperature    200(2)
_cell_volume                     3055.37(11)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD'
_diffrn_measurement_method       '\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  0.0599
_diffrn_reflns_av_sigmaI/netI    0.0418
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            18484
_diffrn_reflns_theta_full        21.51
_diffrn_reflns_theta_max         21.51
_diffrn_reflns_theta_min         1.43
_exptl_absorpt_coefficient_mu    0.136
_exptl_absorpt_correction_T_max  0.9628
_exptl_absorpt_correction_T_min  0.9450
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G. M. (2008). <i>SADABS</i>. University of G\"ottingen, Germany.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.045
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       polyhedron
_exptl_crystal_F_000             1048
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.411
_refine_diff_density_min         -0.224
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     389
_refine_ls_number_reflns         3523
_refine_ls_number_restraints     576
_refine_ls_restrained_S_all      1.183
_refine_ls_R_factor_all          0.0906
_refine_ls_R_factor_gt           0.0628
_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^)+(0.1098P)^2^+1.4638P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1687
_refine_ls_wR_factor_ref         0.1935
_reflns_number_gt                2512
_reflns_number_total             3523
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2nj20847d.txt
_cod_data_source_block           bc1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7052850