# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2018

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
# Full information about CCDC data access policies and citation 
# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
# this file and to allow appropriate attribution of the data. 
# 
#######################################################################

data_FP488-1
_audit_block_doi                 10.5517/ccdc.csd.cc1z87s8
_database_code_depnum_ccdc_archive 'CCDC 1825180'
_audit_update_record             
;
2018-02-22 deposited with the CCDC.
2018-07-24 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2018/1
_shelx_SHELXL_version_number     2018/1
_chemical_name_systematic        ?
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         'C15 H26 N2 O3 S2 Si'
_chemical_formula_sum            'C15 H26 N2 O3 S2 Si'
_chemical_formula_weight         374.59

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0181 0.0091 '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'
N N 0.0311 0.0180 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0492 0.0322 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Si Si 0.2541 0.3302 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
S S 0.3331 0.5567 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_H-M_alt        'P 21 21 21'
_space_group_name_Hall           'P 2ac 2ab'

_shelx_space_group_comment       
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;

loop_
_space_group_symop_operation_xyz
'x, y, z'
'x+1/2, -y+1/2, -z'
'-x, y+1/2, -z+1/2'
'-x+1/2, -y, z+1/2'

_cell_length_a                   7.68141(14)
_cell_length_b                   10.8441(2)
_cell_length_c                   23.4756(4)
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_volume                     1955.48(6)
_cell_formula_units_Z            4
_cell_measurement_temperature    170
_cell_measurement_reflns_used    19684
_cell_measurement_theta_min      3.765
_cell_measurement_theta_max      68.240

_exptl_crystal_description       pillar
_exptl_crystal_colour            colourless
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_F_000             800
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.83
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_exptl_absorpt_coefficient_mu    3.177
_shelx_estimated_absorpt_T_min   0.178
_shelx_estimated_absorpt_T_max   0.665
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_correction_T_min  0.2858
_exptl_absorpt_correction_T_max  0.6879
_exptl_absorpt_process_details   
;
 numabs
;
_exptl_absorpt_special_details   ?
_diffrn_ambient_temperature      170
_diffrn_radiation_wavelength     1.54187
_diffrn_radiation_type           CuK\a
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_monochromator  graphite
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID'
_diffrn_measurement_method       ω-scan
_diffrn_detector_area_resol_mean 10
_diffrn_reflns_number            21681
_diffrn_reflns_av_unetI/netI     0.0291
_diffrn_reflns_av_R_equivalents  0.0421
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_theta_min         3.766
_diffrn_reflns_theta_max         68.241
_diffrn_reflns_theta_full        67.687
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measured_fraction_theta_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_point_group_measured_fraction_full 0.995
_reflns_number_total             3550
_reflns_number_gt                3454
_reflns_threshold_expression     'I > 2σ(I)'
_reflns_Friedel_coverage         0.724
_reflns_Friedel_fraction_max     0.991
_reflns_Friedel_fraction_full    0.993

_reflns_special_details          
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences.
;

_computing_data_collection       PROCESS-AUTO
_computing_cell_refinement       PROCESS-AUTO
_computing_data_reduction        PROCESS-AUTO
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-2018/1 (Sheldrick, 2018)'
_computing_molecular_graphics    SHELXLE
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_refine_special_details          ?
_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'w=1/[σ²(Fo²)+(0.0336P)²+0.3114P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   difmap
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     none
_refine_ls_extinction_coef       .
_refine_ls_abs_structure_details 
;
 Flack x determined using 1389 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.012(5)
_chemical_absolute_configuration adrm
_refine_ls_number_reflns         3550
_refine_ls_number_parameters     215
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0278
_refine_ls_R_factor_gt           0.0267
_refine_ls_wR_factor_ref         0.0661
_refine_ls_wR_factor_gt          0.0656
_refine_ls_goodness_of_fit_ref   1.080
_refine_ls_restrained_S_all      1.080
_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_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
S1 S 0.55559(8) 0.62131(5) 0.55550(2) 0.03037(15) Uani 1 1 d . . . . .
S2 S 0.58762(8) 0.74325(5) 0.48813(2) 0.02832(14) Uani 1 1 d . . . . .
Si1 Si 0.24127(9) 0.75919(7) 0.26437(3) 0.03285(17) Uani 1 1 d . . . . .
O1 O 0.3610(2) 0.37555(16) 0.48195(8) 0.0361(4) Uani 1 1 d . . . . .
O2 O 0.9243(2) 0.59519(15) 0.41666(7) 0.0301(4) Uani 1 1 d . . . . .
O3 O 0.3728(3) 0.66839(19) 0.30041(7) 0.0449(5) Uani 1 1 d . . . . .
N1 N 0.4811(2) 0.53356(18) 0.43205(7) 0.0251(4) Uani 1 1 d . . . . .
N2 N 0.7879(2) 0.48960(17) 0.48855(8) 0.0240(4) Uani 1 1 d . . . . .
C1 C 0.4741(3) 0.4535(2) 0.47568(9) 0.0260(5) Uani 1 1 d . . . . .
C2 C 0.6233(3) 0.4746(2) 0.51804(10) 0.0256(5) Uani 1 1 d . . . . .
C3 C 0.7938(3) 0.5690(2) 0.44342(9) 0.0236(5) Uani 1 1 d . . . . .
C4 C 0.6169(3) 0.6251(2) 0.43074(9) 0.0243(5) Uani 1 1 d . . . . .
C5 C 0.5967(3) 0.6863(2) 0.37303(10) 0.0317(6) Uani 1 1 d . . . . .
H5A H 0.667730 0.643798 0.343809 0.038 Uiso 1 1 calc R U . . .
H5B H 0.631401 0.774119 0.374650 0.038 Uiso 1 1 calc R U . . .
C6 C 0.4014(3) 0.6732(2) 0.36020(10) 0.0334(6) Uani 1 1 d . . . . .
H6 H 0.335602 0.743683 0.377233 0.040 Uiso 1 1 calc R U . . .
C7 C 0.3470(3) 0.5522(3) 0.38851(10) 0.0339(6) Uani 1 1 d . . . . .
H7A H 0.230076 0.559330 0.405941 0.041 Uiso 1 1 calc R U . . .
H7B H 0.346302 0.483522 0.360705 0.041 Uiso 1 1 calc R U . . .
C8 C 0.6262(3) 0.3749(2) 0.56322(11) 0.0350(6) Uani 1 1 d . . . . .
H8A H 0.656571 0.295789 0.545625 0.052 Uiso 1 1 calc R U . . .
H8B H 0.511055 0.368624 0.580953 0.052 Uiso 1 1 calc R U . . .
H8C H 0.712907 0.395678 0.592297 0.052 Uiso 1 1 calc R U . . .
C9 C 0.9503(3) 0.4422(2) 0.51289(12) 0.0349(6) Uani 1 1 d . . . . .
H9A H 0.971668 0.481736 0.549763 0.052 Uiso 1 1 calc R U . . .
H9B H 1.047014 0.460229 0.486989 0.052 Uiso 1 1 calc R U . . .
H9C H 0.940757 0.352772 0.518204 0.052 Uiso 1 1 calc R U . . .
C10 C 0.0116(4) 0.7266(4) 0.28227(14) 0.0706(12) Uani 1 1 d . . . . .
H10A H -0.007470 0.741216 0.322990 0.106 Uiso 1 1 calc R U . . .
H10B H -0.015163 0.640427 0.273259 0.106 Uiso 1 1 calc R U . . .
H10C H -0.064496 0.780921 0.260041 0.106 Uiso 1 1 calc R U . . .
C11 C 0.2897(6) 0.9223(3) 0.28306(15) 0.0669(10) Uani 1 1 d . . . . .
H11A H 0.214591 0.977153 0.260776 0.100 Uiso 1 1 calc R U . . .
H11B H 0.411960 0.940373 0.274481 0.100 Uiso 1 1 calc R U . . .
H11C H 0.268178 0.935355 0.323759 0.100 Uiso 1 1 calc R U . . .
C12 C 0.2948(4) 0.7241(3) 0.18779(10) 0.0400(7) Uani 1 1 d . . . . .
C13 C 0.1913(5) 0.8125(3) 0.14915(13) 0.0626(10) Uani 1 1 d . . . . .
H13A H 0.211500 0.790936 0.109160 0.094 Uiso 1 1 calc R U . . .
H13B H 0.229597 0.897424 0.155983 0.094 Uiso 1 1 calc R U . . .
H13C H 0.066809 0.805405 0.157750 0.094 Uiso 1 1 calc R U . . .
C14 C 0.4913(5) 0.7421(4) 0.17831(14) 0.0642(9) Uani 1 1 d . . . . .
H14A H 0.518619 0.730372 0.137898 0.096 Uiso 1 1 calc R U . . .
H14B H 0.555988 0.681874 0.201110 0.096 Uiso 1 1 calc R U . . .
H14C H 0.524549 0.825724 0.189892 0.096 Uiso 1 1 calc R U . . .
C15 C 0.2466(5) 0.5909(3) 0.17362(12) 0.0524(8) Uani 1 1 d . . . . .
H15A H 0.279167 0.572846 0.134137 0.079 Uiso 1 1 calc R U . . .
H15B H 0.120829 0.579590 0.178332 0.079 Uiso 1 1 calc R U . . .
H15C H 0.308783 0.534960 0.199306 0.079 Uiso 1 1 calc R U . . .


_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
S1 C2 1.890(2) . ?
S1 S2 2.0762(8) . ?
S2 C4 1.873(2) . ?
Si1 O3 1.6448(19) . ?
Si1 C10 1.848(3) . ?
Si1 C11 1.860(3) . ?
Si1 C12 1.883(3) . ?
O1 C1 1.221(3) . ?
O2 C3 1.217(3) . ?
O3 C6 1.422(3) . ?
N1 C1 1.344(3) . ?
N1 C4 1.440(3) . ?
N1 C7 1.465(3) . ?
N2 C3 1.366(3) . ?
N2 C2 1.450(3) . ?
N2 C9 1.466(3) . ?
C1 C2 1.534(3) . ?
C2 C8 1.515(3) . ?
C3 C4 1.518(3) . ?
C4 C5 1.517(3) . ?
C5 C6 1.537(4) . ?
C5 H5A 0.9900 . ?
C5 H5B 0.9900 . ?
C6 C7 1.529(4) . ?
C6 H6 1.0000 . ?
C7 H7A 0.9900 . ?
C7 H7B 0.9900 . ?
C8 H8A 0.9800 . ?
C8 H8B 0.9800 . ?
C8 H8C 0.9800 . ?
C9 H9A 0.9800 . ?
C9 H9B 0.9800 . ?
C9 H9C 0.9800 . ?
C10 H10A 0.9800 . ?
C10 H10B 0.9800 . ?
C10 H10C 0.9800 . ?
C11 H11A 0.9800 . ?
C11 H11B 0.9800 . ?
C11 H11C 0.9800 . ?
C12 C15 1.527(4) . ?
C12 C14 1.538(4) . ?
C12 C13 1.541(4) . ?
C13 H13A 0.9800 . ?
C13 H13B 0.9800 . ?
C13 H13C 0.9800 . ?
C14 H14A 0.9800 . ?
C14 H14B 0.9800 . ?
C14 H14C 0.9800 . ?
C15 H15A 0.9800 . ?
C15 H15B 0.9800 . ?
C15 H15C 0.9800 . ?

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
C2 S1 S2 98.58(7) . . ?
C4 S2 S1 97.26(7) . . ?
O3 Si1 C10 110.79(16) . . ?
O3 Si1 C11 108.97(15) . . ?
C10 Si1 C11 108.6(2) . . ?
O3 Si1 C12 103.64(11) . . ?
C10 Si1 C12 112.76(14) . . ?
C11 Si1 C12 111.95(15) . . ?
C6 O3 Si1 125.52(16) . . ?
C1 N1 C4 119.37(19) . . ?
C1 N1 C7 126.3(2) . . ?
C4 N1 C7 113.54(19) . . ?
C3 N2 C2 118.02(18) . . ?
C3 N2 C9 119.7(2) . . ?
C2 N2 C9 121.10(18) . . ?
O1 C1 N1 124.6(2) . . ?
O1 C1 C2 123.8(2) . . ?
N1 C1 C2 111.6(2) . . ?
N2 C2 C8 113.65(19) . . ?
N2 C2 C1 110.99(18) . . ?
C8 C2 C1 111.0(2) . . ?
N2 C2 S1 111.56(16) . . ?
C8 C2 S1 106.22(16) . . ?
C1 C2 S1 102.82(15) . . ?
O2 C3 N2 125.1(2) . . ?
O2 C3 C4 122.9(2) . . ?
N2 C3 C4 112.01(19) . . ?
N1 C4 C5 104.28(18) . . ?
N1 C4 C3 111.60(18) . . ?
C5 C4 C3 116.22(19) . . ?
N1 C4 S2 111.67(15) . . ?
C5 C4 S2 109.33(16) . . ?
C3 C4 S2 103.92(15) . . ?
C4 C5 C6 103.55(19) . . ?
C4 C5 H5A 111.1 . . ?
C6 C5 H5A 111.1 . . ?
C4 C5 H5B 111.1 . . ?
C6 C5 H5B 111.1 . . ?
H5A C5 H5B 109.0 . . ?
O3 C6 C7 110.8(2) . . ?
O3 C6 C5 110.4(2) . . ?
C7 C6 C5 105.1(2) . . ?
O3 C6 H6 110.1 . . ?
C7 C6 H6 110.1 . . ?
C5 C6 H6 110.1 . . ?
N1 C7 C6 103.2(2) . . ?
N1 C7 H7A 111.1 . . ?
C6 C7 H7A 111.1 . . ?
N1 C7 H7B 111.1 . . ?
C6 C7 H7B 111.1 . . ?
H7A C7 H7B 109.1 . . ?
C2 C8 H8A 109.5 . . ?
C2 C8 H8B 109.5 . . ?
H8A C8 H8B 109.5 . . ?
C2 C8 H8C 109.5 . . ?
H8A C8 H8C 109.5 . . ?
H8B C8 H8C 109.5 . . ?
N2 C9 H9A 109.5 . . ?
N2 C9 H9B 109.5 . . ?
H9A C9 H9B 109.5 . . ?
N2 C9 H9C 109.5 . . ?
H9A C9 H9C 109.5 . . ?
H9B C9 H9C 109.5 . . ?
Si1 C10 H10A 109.5 . . ?
Si1 C10 H10B 109.5 . . ?
H10A C10 H10B 109.5 . . ?
Si1 C10 H10C 109.5 . . ?
H10A C10 H10C 109.5 . . ?
H10B C10 H10C 109.5 . . ?
Si1 C11 H11A 109.5 . . ?
Si1 C11 H11B 109.5 . . ?
H11A C11 H11B 109.5 . . ?
Si1 C11 H11C 109.5 . . ?
H11A C11 H11C 109.5 . . ?
H11B C11 H11C 109.5 . . ?
C15 C12 C14 109.1(3) . . ?
C15 C12 C13 109.6(2) . . ?
C14 C12 C13 110.0(3) . . ?
C15 C12 Si1 110.25(19) . . ?
C14 C12 Si1 109.1(2) . . ?
C13 C12 Si1 108.9(2) . . ?
C12 C13 H13A 109.5 . . ?
C12 C13 H13B 109.5 . . ?
H13A C13 H13B 109.5 . . ?
C12 C13 H13C 109.5 . . ?
H13A C13 H13C 109.5 . . ?
H13B C13 H13C 109.5 . . ?
C12 C14 H14A 109.5 . . ?
C12 C14 H14B 109.5 . . ?
H14A C14 H14B 109.5 . . ?
C12 C14 H14C 109.5 . . ?
H14A C14 H14C 109.5 . . ?
H14B C14 H14C 109.5 . . ?
C12 C15 H15A 109.5 . . ?
C12 C15 H15B 109.5 . . ?
H15A C15 H15B 109.5 . . ?
C12 C15 H15C 109.5 . . ?
H15A C15 H15C 109.5 . . ?
H15B C15 H15C 109.5 . . ?

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
C10 Si1 O3 C6 -68.7(3) . . . . ?
C11 Si1 O3 C6 50.7(3) . . . . ?
C12 Si1 O3 C6 170.1(2) . . . . ?
C4 N1 C1 O1 177.1(2) . . . . ?
C7 N1 C1 O1 7.7(4) . . . . ?
C4 N1 C1 C2 -1.0(3) . . . . ?
C7 N1 C1 C2 -170.5(2) . . . . ?
C3 N2 C2 C8 173.9(2) . . . . ?
C9 N2 C2 C8 -18.6(3) . . . . ?
C3 N2 C2 C1 48.0(3) . . . . ?
C9 N2 C2 C1 -144.5(2) . . . . ?
C3 N2 C2 S1 -66.1(2) . . . . ?
C9 N2 C2 S1 101.5(2) . . . . ?
O1 C1 C2 N2 135.8(2) . . . . ?
N1 C1 C2 N2 -46.1(3) . . . . ?
O1 C1 C2 C8 8.4(3) . . . . ?
N1 C1 C2 C8 -173.4(2) . . . . ?
O1 C1 C2 S1 -104.8(2) . . . . ?
N1 C1 C2 S1 73.3(2) . . . . ?
S2 S1 C2 N2 49.85(16) . . . . ?
S2 S1 C2 C8 174.19(15) . . . . ?
S2 S1 C2 C1 -69.15(14) . . . . ?
C2 N2 C3 O2 176.1(2) . . . . ?
C9 N2 C3 O2 8.4(3) . . . . ?
C2 N2 C3 C4 -2.4(3) . . . . ?
C9 N2 C3 C4 -170.1(2) . . . . ?
C1 N1 C4 C5 173.2(2) . . . . ?
C7 N1 C4 C5 -16.0(2) . . . . ?
C1 N1 C4 C3 47.0(3) . . . . ?
C7 N1 C4 C3 -142.3(2) . . . . ?
C1 N1 C4 S2 -68.9(2) . . . . ?
C7 N1 C4 S2 101.90(19) . . . . ?
O2 C3 C4 N1 136.8(2) . . . . ?
N2 C3 C4 N1 -44.7(2) . . . . ?
O2 C3 C4 C5 17.4(3) . . . . ?
N2 C3 C4 C5 -164.1(2) . . . . ?
O2 C3 C4 S2 -102.7(2) . . . . ?
N2 C3 C4 S2 75.8(2) . . . . ?
S1 S2 C4 N1 50.39(16) . . . . ?
S1 S2 C4 C5 165.27(15) . . . . ?
S1 S2 C4 C3 -70.04(14) . . . . ?
N1 C4 C5 C6 29.0(2) . . . . ?
C3 C4 C5 C6 152.2(2) . . . . ?
S2 C4 C5 C6 -90.6(2) . . . . ?
Si1 O3 C6 C7 118.5(2) . . . . ?
Si1 O3 C6 C5 -125.5(2) . . . . ?
C4 C5 C6 O3 -151.4(2) . . . . ?
C4 C5 C6 C7 -31.9(2) . . . . ?
C1 N1 C7 C6 166.0(2) . . . . ?
C4 N1 C7 C6 -4.0(2) . . . . ?
O3 C6 C7 N1 141.4(2) . . . . ?
C5 C6 C7 N1 22.2(2) . . . . ?
O3 Si1 C12 C15 64.9(2) . . . . ?
C10 Si1 C12 C15 -54.9(3) . . . . ?
C11 Si1 C12 C15 -177.8(2) . . . . ?
O3 Si1 C12 C14 -54.8(3) . . . . ?
C10 Si1 C12 C14 -174.7(3) . . . . ?
C11 Si1 C12 C14 62.4(3) . . . . ?
O3 Si1 C12 C13 -174.9(2) . . . . ?
C10 Si1 C12 C13 65.3(3) . . . . ?
C11 Si1 C12 C13 -57.6(3) . . . . ?

_refine_diff_density_max         0.216
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.037

