data_global  
_audit_update_record
;
2006-02-15  Received for J. Org. Chem. manuscript jo060314q
            Minor syntax errors corrected (JOC/pH)
;

_publ_requested_journal             'Organic Letters' 
_publ_contact_author      'Prof. J.A. Marco' 
  
# Departamento de Q. Org\'anica, Universidad de Valencia, Spain'
_publ_contact_letter 
; please consider this cif submission for 
publication in 'Organic Letters'
; 
_publ_requested_coeditor_name  ?
_publ_contact_author_phone      '+34 96 3544337' 
_publ_contact_author_fax        '+34 96 3544328' 
_publ_contact_author_email      'alberto.marco@uv.es' 
loop_ _publ_author_name ?
_publ_author_address     'as above' 
  
_publ_section_title ?
_publ_section_abstract ? 
_publ_section_experimental ? 
  
_publ_section_references ?
  
data_str782m 
  
_audit_creation_method            SHELXL-97 
_chemical_name_systematic 
; 
 ? 
; 
_chemical_name_common             ? 
_chemical_melting_point           ? 
_chemical_formula_moiety          ? 
_chemical_formula_sum 
 'C32 H50 O4 Si2' 
_chemical_formula_weight          554.90 
  
loop_ 
 _atom_type_symbol 
 _atom_type_description 
 _atom_type_scat_dispersion_real 
 _atom_type_scat_dispersion_imag 
 _atom_type_scat_source 
 'C'  'C'   0.0033   0.0016 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'H'  'H'   0.0000   0.0000 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'O'  'O'   0.0106   0.0060 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
 'Si'  'Si'   0.0817   0.0704 
 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 
  
_symmetry_cell_setting            Monoclinic 
_symmetry_space_group_name_H-M    P(2)1 
  
loop_ 
 _symmetry_equiv_pos_as_xyz 
 'x, y, z' 
 '-x, y+1/2, -z' 
  
_cell_length_a                    11.4799(9) 
_cell_length_b                    11.0020(8) 
_cell_length_c                    13.6671(11) 
_cell_angle_alpha                 90.00 
_cell_angle_beta                  102.557(2) 
_cell_angle_gamma                 90.00 
_cell_volume                      1684.9(2) 
_cell_formula_units_Z             2 
_cell_measurement_temperature     293(2) 
_cell_measurement_reflns_used     ? 
_cell_measurement_theta_min       ? 
_cell_measurement_theta_max       ? 
  
_exptl_crystal_description        Prism 
_exptl_crystal_colour             Colorless 
_exptl_crystal_size_max           0.28 
_exptl_crystal_size_mid           0.19 
_exptl_crystal_size_min           0.14 
_exptl_crystal_density_meas       ? 
_exptl_crystal_density_diffrn     1.094 
_exptl_crystal_density_method     'not measured' 
_exptl_crystal_F_000              604 
_exptl_absorpt_coefficient_mu     0.136 
_exptl_absorpt_correction_type    'Bruker SADABS' 
_exptl_absorpt_correction_T_min   ? 
_exptl_absorpt_correction_T_max   ? 
_exptl_absorpt_process_details    ? 
  
_exptl_special_details 
; 
 ? 
; 
  
_diffrn_ambient_temperature       293(2) 
_diffrn_radiation_wavelength      0.71073 
_diffrn_radiation_type            MoK\a 
_diffrn_radiation_source          'fine-focus sealed tube' 
_diffrn_radiation_monochromator   graphite 
_diffrn_measurement_device_type   'Bruker P4' 
_diffrn_measurement_method        'ω scans' 
_diffrn_detector_area_resol_mean  ? 
_diffrn_standards_number          ? 
_diffrn_standards_interval_count  ? 
_diffrn_standards_interval_time   ? 
_diffrn_standards_decay_%         ? 
_diffrn_reflns_number             9516 
_diffrn_reflns_av_R_equivalents   0.0797 
_diffrn_reflns_av_sigmaI/netI     0.1629 
_diffrn_reflns_limit_h_min        -12 
_diffrn_reflns_limit_h_max        13 
_diffrn_reflns_limit_k_min        -13 
_diffrn_reflns_limit_k_max        13 
_diffrn_reflns_limit_l_min        -14 
_diffrn_reflns_limit_l_max        16 
_diffrn_reflns_theta_min          1.53 
_diffrn_reflns_theta_max          25.01 
_reflns_number_total              5811 
_reflns_number_gt                 2854 
_reflns_threshold_expression      >2sigma(I) 
  
_computing_data_collection        'Bruker XSCANS' 
_computing_cell_refinement        'Bruker XSCANS' 
_computing_data_reduction         'Bruker SHELXTL' 
_computing_structure_solution     'SHELXS-97 (Sheldrick, 1990)' 
_computing_structure_refinement   'SHELXL-97 (Sheldrick, 1997)' 
_computing_molecular_graphics     'Bruker SHELXTL' 
_computing_publication_material   'Bruker SHELXTL' 
  
_refine_special_details 
; 
 Refinement of F² against ALL reflections.  The weighted R-factor wR and 
 goodness of fit S are based on F², conventional R-factors R are based 
 on F, with F set to zero for negative F². The threshold expression of 
 F² > 2sigma(F²) is used only for calculating R-factors(gt) etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F² are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
; 
  
_refine_ls_structure_factor_coef  Fsqd 
_refine_ls_matrix_type            full 
_refine_ls_weighting_scheme       calc 
_refine_ls_weighting_details 
 'calc w=1/[σ²(Fo²)+(0.0314P)²+0.0000P] where P=(Fo²+2Fc²)/3' 
_atom_sites_solution_primary      direct 
_atom_sites_solution_secondary    difmap 
_atom_sites_solution_hydrogens    geom 
_refine_ls_hydrogen_treatment     mixed 
_refine_ls_extinction_method      none 
_refine_ls_extinction_coef        ? 
_refine_ls_abs_structure_details 
 'Flack H D (1983), Acta Cryst. A39, 876-881' 
_refine_ls_abs_structure_Flack    -0.07(16) 
_refine_ls_number_reflns          5811 
_refine_ls_number_parameters      343 
_refine_ls_number_restraints      1 
_refine_ls_R_factor_all           0.1644 
_refine_ls_R_factor_gt            0.0601 
_refine_ls_wR_factor_ref          0.1196 
_refine_ls_wR_factor_gt           0.0918 
_refine_ls_goodness_of_fit_ref    0.963 
_refine_ls_restrained_S_all       0.963 
_refine_ls_shift/su_max           0.001 
_refine_ls_shift/su_mean          0.000 
  
loop_ 
 _atom_site_label 
 _atom_site_type_symbol 
 _atom_site_fract_x 
 _atom_site_fract_y 
 _atom_site_fract_z 
 _atom_site_U_iso_or_equiv 
 _atom_site_adp_type 
 _atom_site_occupancy 
 _atom_site_symmetry_multiplicity 
 _atom_site_calc_flag 
 _atom_site_refinement_flags 
 _atom_site_disorder_assembly 
 _atom_site_disorder_group 
Si1 Si 0.75499(11) 0.77518(11) 0.98316(10) 0.0434(4) Uani 1 1 d . . . 
O1 O 1.0542(3) 0.8508(3) 0.8051(3) 0.0538(10) Uani 1 1 d . . . 
C1 C 1.0485(4) 0.8209(6) 1.1152(4) 0.0747(18) Uani 1 1 d . . . 
H1A H 0.9913 0.8651 1.1430 0.112 Uiso 1 1 calc R . . 
H1B H 1.1229 0.8642 1.1280 0.112 Uiso 1 1 calc R . . 
H1C H 1.0605 0.7418 1.1455 0.112 Uiso 1 1 calc R . . 
Si2 Si 1.23988(12) 0.74896(12) 0.51356(10) 0.0493(4) Uani 1 1 d . . . 
C2 C 1.0026(4) 0.8073(5) 1.0030(3) 0.0481(14) Uani 1 1 d . . . 
H2 H 0.9901 0.8883 0.9726 0.058 Uiso 1 1 calc R . . 
O2 O 1.0106(3) 0.9906(4) 0.6914(3) 0.0758(12) Uani 1 1 d . . . 
O3 O 1.1758(3) 0.7590(3) 0.6097(2) 0.0629(10) Uani 1 1 d . . . 
C3 C 1.0915(4) 0.7380(5) 0.9558(3) 0.0533(14) Uani 1 1 d . . . 
H3A H 1.1020 0.6573 0.9850 0.064 Uiso 1 1 calc R . . 
H3B H 1.1680 0.7791 0.9729 0.064 Uiso 1 1 calc R . . 
O4 O 0.8925(2) 0.7414(3) 0.9798(2) 0.0464(8) Uani 1 1 d . . . 
C4 C 1.0556(4) 0.7254(4) 0.8419(4) 0.0485(14) Uani 1 1 d . . . 
H4 H 0.9754 0.6904 0.8227 0.058 Uiso 1 1 calc R . . 
C5 C 1.1432(5) 0.6470(5) 0.8013(4) 0.0665(17) Uani 1 1 d . . . 
H5A H 1.1658 0.5782 0.8457 0.080 Uiso 1 1 calc R . . 
H5B H 1.2147 0.6941 0.8016 0.080 Uiso 1 1 calc R . . 
C6 C 1.0942(5) 0.6001(5) 0.6954(5) 0.0785(19) Uani 1 1 d . . . 
H6A H 1.1512 0.5431 0.6785 0.094 Uiso 1 1 calc R . . 
H6B H 1.0211 0.5556 0.6950 0.094 Uiso 1 1 calc R . . 
C7 C 1.0682(5) 0.6961(5) 0.6148(4) 0.0692(18) Uani 1 1 d . . . 
H7 H 1.0398 0.6546 0.5506 0.083 Uiso 1 1 calc R . . 
C8 C 0.9760(4) 0.7935(6) 0.6247(4) 0.0602(16) Uani 1 1 d . . . 
H8 H 0.9669 0.8419 0.5633 0.072 Uiso 1 1 calc R . . 
C9 C 1.0162(4) 0.8833(6) 0.7083(5) 0.0538(15) Uani 1 1 d . . . 
C10 C 0.8513(4) 0.7439(6) 0.6225(4) 0.090(2) Uani 1 1 d . . . 
H10A H 0.8295 0.6873 0.5681 0.135 Uiso 1 1 calc R . . 
H10B H 0.7951 0.8098 0.6132 0.135 Uiso 1 1 calc R . . 
H10C H 0.8508 0.7035 0.6846 0.135 Uiso 1 1 calc R . . 
C11 C 1.2818(5) 0.5899(5) 0.4978(4) 0.0833(19) Uani 1 1 d . . . 
H11A H 1.2111 0.5409 0.4806 0.125 Uiso 1 1 calc R . . 
H11B H 1.3311 0.5608 0.5592 0.125 Uiso 1 1 calc R . . 
H11C H 1.3251 0.5849 0.4452 0.125 Uiso 1 1 calc R . . 
C12 C 1.1359(5) 0.8008(7) 0.3971(4) 0.097(2) Uani 1 1 d . . . 
H12A H 1.0683 0.7473 0.3822 0.146 Uiso 1 1 calc R . . 
H12B H 1.1762 0.8000 0.3426 0.146 Uiso 1 1 calc R . . 
H12C H 1.1093 0.8819 0.4066 0.146 Uiso 1 1 calc R . . 
C13 C 1.3721(5) 0.8482(6) 0.5464(4) 0.0657(17) Uani 1 1 d . . . 
C14 C 1.3390(7) 0.9786(6) 0.5607(7) 0.153(4) Uani 1 1 d . . . 
H14A H 1.2857 1.0071 0.5011 0.229 Uiso 1 1 calc R . . 
H14B H 1.4098 1.0277 0.5740 0.229 Uiso 1 1 calc R . . 
H14C H 1.3005 0.9839 0.6163 0.229 Uiso 1 1 calc R . . 
C15 C 1.4420(6) 0.8437(8) 0.4627(6) 0.157(4) Uani 1 1 d . . . 
H15A H 1.3915 0.8698 0.4008 0.236 Uiso 1 1 calc R . . 
H15B H 1.4682 0.7619 0.4555 0.236 Uiso 1 1 calc R . . 
H15C H 1.5101 0.8964 0.4795 0.236 Uiso 1 1 calc R . . 
C16 C 1.4534(6) 0.8085(9) 0.6404(5) 0.163(4) Uani 1 1 d . . . 
H16A H 1.4756 0.7252 0.6341 0.244 Uiso 1 1 calc R . . 
H16B H 1.4137 0.8161 0.6951 0.244 Uiso 1 1 calc R . . 
H16C H 1.5237 0.8584 0.6530 0.244 Uiso 1 1 calc R . . 
C17 C 0.7377(4) 0.7900(4) 1.1167(3) 0.0420(12) Uani 1 1 d . . . 
C18 C 0.6589(5) 0.8674(5) 1.1483(4) 0.0656(16) Uani 1 1 d . . . 
H18 H 0.6165 0.9230 1.1029 0.079 Uiso 1 1 calc R . . 
C19 C 0.6406(5) 0.8654(6) 1.2449(5) 0.0745(19) Uani 1 1 d . . . 
H19 H 0.5839 0.9167 1.2622 0.089 Uiso 1 1 calc R . . 
C20 C 0.7039(5) 0.7900(6) 1.3145(4) 0.0656(16) Uani 1 1 d . . . 
H20 H 0.6940 0.7914 1.3802 0.079 Uiso 1 1 calc R . . 
C21 C 0.7830(5) 0.7114(5) 1.2864(4) 0.0695(17) Uani 1 1 d . . . 
H21 H 0.8264 0.6581 1.3332 0.083 Uiso 1 1 calc R . . 
C22 C 0.7989(4) 0.7105(5) 1.1889(4) 0.0627(16) Uani 1 1 d . . . 
H22 H 0.8520 0.6551 1.1712 0.075 Uiso 1 1 calc R . . 
C23 C 0.7070(4) 0.9159(4) 0.9074(4) 0.0408(13) Uani 1 1 d . . . 
C24 C 0.6032(5) 0.9794(5) 0.9058(4) 0.0717(18) Uani 1 1 d . . . 
H24 H 0.5536 0.9537 0.9473 0.086 Uiso 1 1 calc R . . 
C25 C 0.5694(6) 1.0794(6) 0.8455(5) 0.089(2) Uani 1 1 d . . . 
H25 H 0.4987 1.1198 0.8469 0.107 Uiso 1 1 calc R . . 
C26 C 0.6402(7) 1.1185(5) 0.7840(4) 0.080(2) Uani 1 1 d . . . 
H26 H 0.6180 1.1858 0.7430 0.096 Uiso 1 1 calc R . . 
C27 C 0.7434(6) 1.0588(6) 0.7826(4) 0.0717(18) Uani 1 1 d . . . 
H27 H 0.7925 1.0861 0.7413 0.086 Uiso 1 1 calc R . . 
C28 C 0.7756(5) 0.9581(5) 0.8419(4) 0.0567(15) Uani 1 1 d . . . 
H28 H 0.8453 0.9169 0.8382 0.068 Uiso 1 1 calc R . . 
C29 C 0.6650(5) 0.6412(5) 0.9226(4) 0.0521(15) Uani 1 1 d . . . 
C30 C 0.5310(4) 0.6694(5) 0.9085(4) 0.0675(17) Uani 1 1 d . . . 
H30A H 0.5120 0.7411 0.8682 0.101 Uiso 1 1 calc R . . 
H30B H 0.5122 0.6826 0.9728 0.101 Uiso 1 1 calc R . . 
H30C H 0.4852 0.6021 0.8758 0.101 Uiso 1 1 calc R . . 
C31 C 0.6960(5) 0.5261(4) 0.9852(5) 0.0758(19) Uani 1 1 d . . . 
H31A H 0.7795 0.5088 0.9931 0.114 Uiso 1 1 calc R . . 
H31B H 0.6501 0.4592 0.9520 0.114 Uiso 1 1 calc R . . 
H31C H 0.6780 0.5379 1.0499 0.114 Uiso 1 1 calc R . . 
C32 C 0.6927(5) 0.6180(5) 0.8182(4) 0.0709(17) Uani 1 1 d . . . 
H32A H 0.6732 0.6893 0.7773 0.106 Uiso 1 1 calc R . . 
H32B H 0.6460 0.5506 0.7867 0.106 Uiso 1 1 calc R . . 
H32C H 0.7759 0.5999 0.8258 0.106 Uiso 1 1 calc R . . 
  
  
_geom_special_details 
; 
 All esds (except the esd in the dihedral angle between two l.s. planes) 
 are estimated using the full covariance matrix.  The cell esds are taken 
 into account individually in the estimation of esds in distances, angles 
 and torsion angles; correlations between esds in cell parameters are only 
 used when they are defined by crystal symmetry.  An approximate (isotropic) 
 treatment of cell esds is used for estimating esds involving l.s. planes. 
; 
  
loop_ 
 _geom_bond_atom_site_label_1 
 _geom_bond_atom_site_label_2 
 _geom_bond_distance 
 _geom_bond_site_symmetry_2 
 _geom_bond_publ_flag 
Si1 O4 1.632(3) . ? 
Si1 C23 1.877(5) . ? 
Si1 C29 1.885(5) . ? 
Si1 C17 1.886(4) . ? 
O1 C9 1.348(6) . ? 
O1 C4 1.467(5) . ? 
C1 C2 1.517(6) . ? 
Si2 O3 1.642(3) . ? 
Si2 C11 1.840(5) . ? 
Si2 C13 1.844(6) . ? 
Si2 C12 1.859(5) . ? 
C2 O4 1.432(5) . ? 
C2 C3 1.525(6) . ? 
O2 C9 1.203(6) . ? 
O3 C7 1.431(6) . ? 
C3 C4 1.527(6) . ? 
C4 C5 1.518(6) . ? 
C5 C6 1.524(7) . ? 
C6 C7 1.508(7) . ? 
C7 C8 1.533(7) . ? 
C8 C9 1.505(7) . ? 
C8 C10 1.525(6) . ? 
C13 C16 1.480(8) . ? 
C13 C14 1.507(8) . ? 
C13 C15 1.534(7) . ? 
C17 C18 1.378(6) . ? 
C17 C22 1.389(6) . ? 
C18 C19 1.382(7) . ? 
C19 C20 1.349(7) . ? 
C20 C21 1.367(7) . ? 
C21 C22 1.384(6) . ? 
C23 C24 1.378(6) . ? 
C23 C28 1.395(6) . ? 
C24 C25 1.379(7) . ? 
C25 C26 1.359(8) . ? 
C26 C27 1.358(7) . ? 
C27 C28 1.375(7) . ? 
C29 C31 1.526(7) . ? 
C29 C30 1.540(6) . ? 
C29 C32 1.549(6) . ? 
  
loop_ 
 _geom_angle_atom_site_label_1 
 _geom_angle_atom_site_label_2 
 _geom_angle_atom_site_label_3 
 _geom_angle 
 _geom_angle_site_symmetry_1 
 _geom_angle_site_symmetry_3 
 _geom_angle_publ_flag 
O4 Si1 C23 109.99(19) . . ? 
O4 Si1 C29 104.5(2) . . ? 
C23 Si1 C29 109.6(2) . . ? 
O4 Si1 C17 110.65(19) . . ? 
C23 Si1 C17 112.5(2) . . ? 
C29 Si1 C17 109.2(2) . . ? 
C9 O1 C4 124.2(4) . . ? 
O3 Si2 C11 109.4(2) . . ? 
O3 Si2 C13 104.7(2) . . ? 
C11 Si2 C13 111.7(3) . . ? 
O3 Si2 C12 110.4(2) . . ? 
C11 Si2 C12 109.1(3) . . ? 
C13 Si2 C12 111.6(3) . . ? 
O4 C2 C1 111.7(4) . . ? 
O4 C2 C3 107.1(4) . . ? 
C1 C2 C3 111.1(4) . . ? 
C7 O3 Si2 123.3(3) . . ? 
C2 C3 C4 114.8(4) . . ? 
C2 O4 Si1 133.8(3) . . ? 
O1 C4 C5 111.5(4) . . ? 
O1 C4 C3 104.1(4) . . ? 
C5 C4 C3 111.8(4) . . ? 
C4 C5 C6 113.7(4) . . ? 
C7 C6 C5 115.4(5) . . ? 
O3 C7 C6 109.8(5) . . ? 
O3 C7 C8 106.6(4) . . ? 
C6 C7 C8 117.1(5) . . ? 
C9 C8 C10 112.4(4) . . ? 
C9 C8 C7 115.0(5) . . ? 
C10 C8 C7 114.3(5) . . ? 
O2 C9 O1 116.2(5) . . ? 
O2 C9 C8 120.2(6) . . ? 
O1 C9 C8 123.5(5) . . ? 
C16 C13 C14 107.3(7) . . ? 
C16 C13 C15 107.7(6) . . ? 
C14 C13 C15 108.4(6) . . ? 
C16 C13 Si2 111.5(5) . . ? 
C14 C13 Si2 112.2(5) . . ? 
C15 C13 Si2 109.6(4) . . ? 
C18 C17 C22 115.6(4) . . ? 
C18 C17 Si1 124.8(4) . . ? 
C22 C17 Si1 119.3(4) . . ? 
C17 C18 C19 122.4(5) . . ? 
C20 C19 C18 120.9(5) . . ? 
C19 C20 C21 118.6(5) . . ? 
C20 C21 C22 120.7(5) . . ? 
C21 C22 C17 121.8(5) . . ? 
C24 C23 C28 115.3(5) . . ? 
C24 C23 Si1 125.2(4) . . ? 
C28 C23 Si1 119.3(4) . . ? 
C23 C24 C25 122.9(5) . . ? 
C26 C25 C24 119.6(5) . . ? 
C27 C26 C25 119.7(5) . . ? 
C26 C27 C28 120.3(5) . . ? 
C27 C28 C23 122.0(5) . . ? 
C31 C29 C30 110.0(4) . . ? 
C31 C29 C32 108.1(5) . . ? 
C30 C29 C32 108.5(4) . . ? 
C31 C29 Si1 111.3(4) . . ? 
C30 C29 Si1 109.5(4) . . ? 
C32 C29 Si1 109.3(3) . . ? 
  
loop_ 
 _geom_torsion_atom_site_label_1 
 _geom_torsion_atom_site_label_2 
 _geom_torsion_atom_site_label_3 
 _geom_torsion_atom_site_label_4 
 _geom_torsion 
 _geom_torsion_site_symmetry_1 
 _geom_torsion_site_symmetry_2 
 _geom_torsion_site_symmetry_3 
 _geom_torsion_site_symmetry_4 
 _geom_torsion_publ_flag 
C11 Si2 O3 C7 -60.7(5) . . . . ? 
C13 Si2 O3 C7 179.5(4) . . . . ? 
C12 Si2 O3 C7 59.3(5) . . . . ? 
O4 C2 C3 C4 60.8(5) . . . . ? 
C1 C2 C3 C4 -177.1(4) . . . . ? 
C1 C2 O4 Si1 74.4(5) . . . . ? 
C3 C2 O4 Si1 -163.8(3) . . . . ? 
C23 Si1 O4 C2 54.6(4) . . . . ? 
C29 Si1 O4 C2 172.2(4) . . . . ? 
C17 Si1 O4 C2 -70.3(4) . . . . ? 
C9 O1 C4 C5 65.8(6) . . . . ? 
C9 O1 C4 C3 -173.6(4) . . . . ? 
C2 C3 C4 O1 64.0(5) . . . . ? 
C2 C3 C4 C5 -175.5(4) . . . . ? 
O1 C4 C5 C6 -81.3(6) . . . . ? 
C3 C4 C5 C6 162.6(4) . . . . ? 
C4 C5 C6 C7 65.4(7) . . . . ? 
Si2 O3 C7 C6 112.3(4) . . . . ? 
Si2 O3 C7 C8 -119.8(4) . . . . ? 
C5 C6 C7 O3 61.4(6) . . . . ? 
C5 C6 C7 C8 -60.4(7) . . . . ? 
O3 C7 C8 C9 -52.7(6) . . . . ? 
C6 C7 C8 C9 70.7(7) . . . . ? 
O3 C7 C8 C10 175.1(4) . . . . ? 
C6 C7 C8 C10 -61.5(7) . . . . ? 
C4 O1 C9 O2 173.6(4) . . . . ? 
C4 O1 C9 C8 -3.2(7) . . . . ? 
C10 C8 C9 O2 -100.4(6) . . . . ? 
C7 C8 C9 O2 126.5(6) . . . . ? 
C10 C8 C9 O1 76.3(7) . . . . ? 
C7 C8 C9 O1 -56.8(7) . . . . ? 
O3 Si2 C13 C16 59.3(6) . . . . ? 
C11 Si2 C13 C16 -58.9(6) . . . . ? 
C12 Si2 C13 C16 178.7(5) . . . . ? 
O3 Si2 C13 C14 -61.1(5) . . . . ? 
C11 Si2 C13 C14 -179.4(5) . . . . ? 
C12 Si2 C13 C14 58.3(6) . . . . ? 
O3 Si2 C13 C15 178.4(5) . . . . ? 
C11 Si2 C13 C15 60.2(6) . . . . ? 
C12 Si2 C13 C15 -62.2(6) . . . . ? 
O4 Si1 C17 C18 148.2(4) . . . . ? 
C23 Si1 C17 C18 24.7(5) . . . . ? 
C29 Si1 C17 C18 -97.3(5) . . . . ? 
O4 Si1 C17 C22 -38.5(4) . . . . ? 
C23 Si1 C17 C22 -161.9(4) . . . . ? 
C29 Si1 C17 C22 76.1(4) . . . . ? 
C22 C17 C18 C19 -0.7(8) . . . . ? 
Si1 C17 C18 C19 172.8(4) . . . . ? 
C17 C18 C19 C20 2.9(9) . . . . ? 
C18 C19 C20 C21 -2.9(9) . . . . ? 
C19 C20 C21 C22 0.9(9) . . . . ? 
C20 C21 C22 C17 1.2(8) . . . . ? 
C18 C17 C22 C21 -1.3(7) . . . . ? 
Si1 C17 C22 C21 -175.2(4) . . . . ? 
O4 Si1 C23 C24 -170.1(4) . . . . ? 
C29 Si1 C23 C24 75.4(5) . . . . ? 
C17 Si1 C23 C24 -46.3(5) . . . . ? 
O4 Si1 C23 C28 14.1(5) . . . . ? 
C29 Si1 C23 C28 -100.3(4) . . . . ? 
C17 Si1 C23 C28 138.0(4) . . . . ? 
C28 C23 C24 C25 -1.2(9) . . . . ? 
Si1 C23 C24 C25 -177.1(5) . . . . ? 
C23 C24 C25 C26 0.2(10) . . . . ? 
C24 C25 C26 C27 0.0(10) . . . . ? 
C25 C26 C27 C28 1.0(10) . . . . ? 
C26 C27 C28 C23 -2.1(9) . . . . ? 
C24 C23 C28 C27 2.2(8) . . . . ? 
Si1 C23 C28 C27 178.3(4) . . . . ? 
O4 Si1 C29 C31 65.5(4) . . . . ? 
C23 Si1 C29 C31 -176.6(3) . . . . ? 
C17 Si1 C29 C31 -52.9(4) . . . . ? 
O4 Si1 C29 C30 -172.6(3) . . . . ? 
C23 Si1 C29 C30 -54.7(4) . . . . ? 
C17 Si1 C29 C30 69.0(4) . . . . ? 
O4 Si1 C29 C32 -53.8(4) . . . . ? 
C23 Si1 C29 C32 64.0(4) . . . . ? 
C17 Si1 C29 C32 -172.3(4) . . . . ? 
  
_diffrn_measured_fraction_theta_max    0.992 
_diffrn_reflns_theta_full              25.01 
_diffrn_measured_fraction_theta_full   0.992 
_refine_diff_density_max    0.241 
_refine_diff_density_min   -0.185 
_refine_diff_density_rms    0.043 
  


