Straightforward synthesis of novel cyclic metallasiloxanes supported by an N,C,N-chelating ligand.
Fridrichová, Adéla; Mairychová, Barbora; Padělková, Zdeňka; Lyčka, Antonín; Jurkschat, Klaus; Jambor, Roman; Dostál, Libor; Dalton transactions (Cambridge, England : 2003) 42 (2013) 16403–16411; doi:10.1039/c3dt52230j

data_7023985
_publ_section_title
;
 Straightforward synthesis of novel cyclic metallasiloxanes supported by
 an N,C,N-chelating ligand.
;
_journal_issue                   46
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              16403
_journal_page_last               16411
_journal_paper_doi               10.1039/c3dt52230j
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C48 H58 N4 O4 Sb2 Si2'
_chemical_formula_sum            'C48 H58 N4 O4 Sb2 Si2'
_chemical_formula_weight         1054.66
_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
_cell_angle_beta                 113.078(4)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   11.7080(5)
_cell_length_b                   15.9991(10)
_cell_length_c                   13.7490(6)
_cell_measurement_reflns_used    20112
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     2369.3(2)
_computing_cell_refinement       'COLLECT and DENZO'
_computing_data_collection
'COLLECT (Hooft, 1998) and DENZO (Otwinowski & Minor, 1997)'
_computing_data_reduction        'COLLECT and DENZO'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(1)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Bruker Nonius KappaCCD area detector'
_diffrn_measurement_method       '\f and \w scans to fill the Ewald sphere'
_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  0.0481
_diffrn_reflns_av_sigmaI/netI    0.0369
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            20039
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.89
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.237
_exptl_absorpt_correction_T_max  0.902
_exptl_absorpt_correction_T_min  0.699
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
Gaussian integration (Coppens, 1970)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.975
_refine_diff_density_min         -0.744
_refine_diff_density_rms         0.093
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.093
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         5376
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.0437
_refine_ls_R_factor_gt           0.0291
_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^)+(0.0192P)^2^+2.7364P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0592
_refine_ls_wR_factor_ref         0.0662
_reflns_number_gt                4424
_reflns_number_total             5376
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt52230j.txt
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7023985