Reversible Photoswitching of the Coordination Numbers of Silicon in Organosilicon Compounds Bearing a 2-(Phenylazo)phenyl Group
Naokazu Kano; Fuminori Komatsu; Masaki Yamamura; Takayuki Kawashima; Journal of the American Chemical Society 128 (2006) 7097–7109; doi:10.1021/ja060926s

data_4110618
_publ_contact_author_address
;
Department of Chemistry, Graduate School of Science,
The University of Tokyo,
7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
;
_publ_contact_author_email       takayuki@chem.s.u-tokyo.ac.jp
_publ_contact_author_fax         +81-5800-6899
_publ_contact_author_name        'Takayuki Kawashima'
_publ_contact_author_phone       +81-5800-6899
_publ_section_title
;
 Reversible Photoswitching of the Coordination Numbers of Silicon in
 Organosilicon Compounds Bearing a 2-(Phenylazo)phenyl Group
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7097
_journal_page_last               7109
_journal_paper_doi               10.1021/ja060926s
_journal_volume                  128
_journal_year                    2006
_chemical_formula_moiety         'C26 H24 N4 Si'
_chemical_formula_sum            'C26 H24 N4 Si'
_chemical_formula_weight         420.58
_chemical_melting_point          395(1)
_chemical_name_common            Dimethylsilane
_chemical_name_systematic
; 
Dimethylbis[2-(phenylazo)phenyl]silane
;
_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                 105.2130(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.344(3)
_cell_length_b                   9.256(2)
_cell_length_c                   20.452(5)
_cell_measurement_reflns_used    6989
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.4835
_cell_measurement_theta_min      3.0043
_cell_volume                     2254.9(9)
_computing_cell_refinement       'CrystalClear (Rigaku Corp., 2000)'
_computing_data_collection       'CrystalClear (Rigaku Corp., 2000)'
_computing_data_reduction        'CrystalClear (Rigaku Corp., 2000)'
_computing_molecular_graphics
'ORTEP-3 for Windows ver 1.08 (Farrugia, 1997-2005)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 14.5666
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_details
;
scan:
    Number of images: 600
               Slice: -70.0000 - 110.0000
         Image width: 0.3000
            Exp time: 28.0000
       Rotation axis: Omega
               Omega: 0.0000
                 Chi: 45.0000
                 Phi: 0.0000
                 XTD: 44.9432
              2theta: 19.7866
scan:
    Number of images: 600
               Slice: -70.0000 - 110.0000
         Image width: 0.3000
            Exp time: 28.0000
       Rotation axis: Omega
               Omega: 0.0000
                 Chi: 45.0000
                 Phi: 90.0000
                 XTD: 44.9432
              2theta: 19.7866

;
_diffrn_measurement_device
;
Mercury CCD (2x2 bin mode)
;
_diffrn_measurement_device_details
;
AFC8: Eulerian 3-circle
;
_diffrn_measurement_method       dtintegrate.ref
_diffrn_orient_matrix_type       d*Trek
_diffrn_orient_matrix_UB_11      0.0752
_diffrn_orient_matrix_UB_12      0.0243
_diffrn_orient_matrix_UB_13      0.0283
_diffrn_orient_matrix_UB_21      -0.0408
_diffrn_orient_matrix_UB_22      0.0967
_diffrn_orient_matrix_UB_23      0.0254
_diffrn_orient_matrix_UB_31      0.0005
_diffrn_orient_matrix_UB_32      -0.0127
_diffrn_orient_matrix_UB_33      0.0491
_diffrn_radiation_detector       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0170
_diffrn_reflns_av_sigmaI/netI    0.0249
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            13525
_diffrn_reflns_reduction_process 'Lp corrections applied'
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.01
_diffrn_source_current           40.0000
_diffrn_source_power             2.0000
_diffrn_source_voltage           50.0000
_exptl_absorpt_coefficient_mu    0.125
_exptl_absorpt_correction_T_max  0.9636
_exptl_absorpt_correction_T_min  0.9461
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Jacobson, R. (1998) Private communication
;
_exptl_crystal_colour            Orange
_exptl_crystal_density_diffrn    1.239
_exptl_crystal_description       Block
_exptl_crystal_F_000             888
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.276
_refine_diff_density_min         -0.283
_refine_diff_density_rms         0.038
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     282
_refine_ls_number_reflns         3949
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.0374
_refine_ls_R_factor_gt           0.0340
_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^)+(0.0515P)^2^+0.6103P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0934
_refine_ls_wR_factor_ref         0.0962
_reflns_number_gt                3519
_reflns_number_total             3949
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja060926ssi20060208_062437.cif
_cod_data_source_block           EE3a
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4110618