#------------------------------------------------------------------------------
#$Date: 2016-02-19 16:29:56 +0200 (Fri, 19 Feb 2016) $
#$Revision: 176759 $
#$URL: svn://www.crystallography.net/cod/cif/2/00/77/2007700.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2007700
loop_
_publ_author_name
'Jones, Peter G.'
'Weinkauf, Andreas'
_publ_section_title
trans-1,3-Diethoxy-5,5-dimethyl-1,3-diphospha-5-silacyclohexane-1,3-dione
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1449
_journal_page_last               1451
_journal_paper_doi               10.1107/S0108270198006337
_journal_volume                  54
_journal_year                    1998
_chemical_formula_moiety         'C9 H22 O4 P2 Si'
_chemical_formula_sum            'C9 H22 O4 P2 Si'
_chemical_formula_weight         284.30
_chemical_name_systematic
;
 trans-1,3-Diethoxy-5,5-dimethyl-1,3-diphospha-5-silacyclohexane-1,3-dione
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_audit_creation_method           SHELXL
_cell_angle_alpha                100.61(2)
_cell_angle_beta                 103.52(2)
_cell_angle_gamma                117.69(2)
_cell_formula_units_Z            4
_cell_length_a                   11.017(3)
_cell_length_b                   11.511(3)
_cell_length_c                   14.292(3)
_cell_measurement_reflns_used    50
_cell_measurement_temperature    178(2)
_cell_measurement_theta_max      11.5
_cell_measurement_theta_min      10.0
_cell_volume                     1467.4(8)
_computing_cell_refinement       'P3 Software'
_computing_data_collection
'P3 Software (Nicolet Instrument Corporation, 1987)'
_computing_data_reduction        'XDISK in P3 Software'
_computing_molecular_graphics    'XP (Siemens, 1994)'
_computing_publication_material  SHELXL93
_computing_structure_refinement  'SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      178(2)
_diffrn_measurement_device       'Nicolet R3'
_diffrn_measurement_method       2θ/ω
_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  0.013
_diffrn_reflns_av_sigmaI/netI    0.017
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            6266
_diffrn_reflns_theta_max         25
_diffrn_reflns_theta_min         3.03
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 147
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.375
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.287
_exptl_crystal_density_meas      ?
_exptl_crystal_description       prism
_exptl_crystal_F_000             608
_exptl_crystal_size_max          0.7
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.360
_refine_diff_density_min         -0.436
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.044
_refine_ls_goodness_of_fit_obs   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         5147
_refine_ls_number_restraints     25
_refine_ls_restrained_S_all      1.042
_refine_ls_restrained_S_obs      1.057
_refine_ls_R_factor_all          0.039
_refine_ls_R_factor_obs          0.032
_refine_ls_shift/esd_max         0.035
_refine_ls_shift/esd_mean        0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[σ²(Fo²)+(0.0432P)²+1.0860P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.089
_refine_ls_wR_factor_obs         0.084
_reflns_number_observed          4481
_reflns_number_total             5147
_reflns_observed_criterion       I>2sigma(I)
_cod_data_source_file            bm1247.cif
_cod_data_source_block           basti
_cod_depositor_comments
;
The following automatic conversions were performed:
'_geom_bond_publ_flag' value 'Y' changed to 'y' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (12 times).

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'Not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.0432P)^2^+1.0860P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to 'w =
1/[\s^2^(Fo^2^)+(0.0432P)^2^+1.0860P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        1467.4(6)
_cod_database_code               2007700
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, -z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_thermal_displace_type
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_occupancy
_atom_site_disorder_group
_atom_site_type_symbol
P1 0.39448(6) 0.37202(5) 0.30819(4) 0.02607(13) Uani d . 1 . P
O1 0.55250(15) 0.51292(15) 0.35683(10) 0.0315(3) Uani d . 1 . O
O2 0.39883(18) 0.24632(16) 0.31058(11) 0.0392(4) Uani d . 1 . O
C11 0.6641(3) 0.5269(3) 0.3146(2) 0.0556(7) Uani d . 1 . C
H11A 0.6322 0.5254 0.2434 0.067 Uiso calc R 1 . H
H11B 0.6781 0.4478 0.3136 0.067 Uiso calc R 1 . H
C12 0.8026(3) 0.6583(3) 0.3772(2) 0.0654(8) Uani d . 1 . C
H12A 0.7887 0.7363 0.3765 0.078 Uiso calc R 1 . H
H12B 0.8786 0.6673 0.3493 0.078 Uiso calc R 1 . H
H12C 0.8334 0.6594 0.4476 0.078 Uiso calc R 1 . H
C2 0.3129(2) 0.3602(2) 0.17908(14) 0.0271(4) Uani d . 1 . C
H2A 0.3658 0.3386 0.1383 0.033 Uiso calc R 1 . H
H2B 0.2097 0.2799 0.1502 0.033 Uiso calc R 1 . H
O4 0.45775(17) 0.63614(15) 0.18768(11) 0.0389(4) Uani d . 1 . O
P3 0.31150(6) 0.50982(5) 0.16100(4) 0.02987(14) Uani d D 1 . P
O3 0.2133(3) 0.4391(3) 0.04062(16) 0.0295(6) Uani d PDU 0.803(9) 1 O
C13 0.1975(4) 0.5265(3) -0.0176(2) 0.0406(10) Uani d PDU 0.803(9) 1 C
H13A 0.2936 0.6144 0.0029 0.049 Uiso calc PR 0.803(9) 1 H
H13B 0.1262 0.5500 -0.0039 0.049 Uiso calc PR 0.803(9) 1 H
C14 0.1451(7) 0.4491(6) -0.1268(3) 0.0426(12) Uani d PDU 0.803(9) 1 C
H14A 0.2168 0.4269 -0.1398 0.051 Uiso calc PR 0.803(9) 1 H
H14B 0.1337 0.5061 -0.1670 0.051 Uiso calc PR 0.803(9) 1 H
H14C 0.0500 0.3624 -0.1465 0.051 Uiso calc PR 0.803(9) 1 H
O3* 0.1939(10) 0.4725(13) 0.0537(7) 0.030(3) Uiso d PDU 0.197(9) 2 O
C13* 0.2544(15) 0.5041(15) -0.0247(8) 0.040(4) Uiso d PDU 0.197(9) 2 C
H13Y 0.3004 0.4500 -0.0388 0.047 Uiso calc PR 0.197(9) 2 H
H13Z 0.3306 0.6047 -0.0015 0.047 Uiso calc PR 0.197(9) 2 H
C14* 0.133(3) 0.467(4) -0.1175(18) 0.064(10) Uiso d PDU 0.197(9) 2 C
H14X 0.1710 0.4869 -0.1718 0.077 Uiso calc PR 0.197(9) 2 H
H14Y 0.0887 0.5212 -0.1028 0.077 Uiso calc PR 0.197(9) 2 H
H14Z 0.0583 0.3670 -0.1398 0.077 Uiso calc PR 0.197(9) 2 H
C4 0.2073(2) 0.5383(2) 0.23111(16) 0.0350(5) Uani d . 1 . C
H4A 0.1051 0.4563 0.2011 0.042 Uiso calc R 1 . H
H4B 0.2032 0.6202 0.2231 0.042 Uiso calc R 1 . H
Si5 0.28422(6) 0.56880(6) 0.37247(4) 0.02887(14) Uani d . 1 . Si
C6 0.2998(2) 0.4142(2) 0.38002(14) 0.0263(4) Uani d . 1 . C
H6A 0.3501 0.4314 0.4528 0.032 Uiso calc R 1 . H
H6B 0.1989 0.3315 0.3571 0.032 Uiso calc R 1 . H
C15 0.1491(3) 0.5665(3) 0.4313(2) 0.0487(6) Uani d . 1 . C
H15A 0.1929 0.5919 0.5056 0.058 Uiso calc R 1 . H
H15B 0.0601 0.4728 0.4031 0.058 Uiso calc R 1 . H
H15C 0.1235 0.6337 0.4161 0.058 Uiso calc R 1 . H
C16 0.4623(2) 0.7376(2) 0.43685(17) 0.0370(5) Uani d . 1 . C
H16A 0.4460 0.8141 0.4350 0.044 Uiso calc R 1 . H
H16B 0.5294 0.7409 0.4015 0.044 Uiso calc R 1 . H
H16C 0.5057 0.7472 0.5081 0.044 Uiso calc R 1 . H
P1' 0.37995(5) 0.13870(5) 0.96686(4) 0.02364(12) Uani d . 1 . P
O1' 0.29301(15) 0.00035(14) 0.99152(10) 0.0277(3) Uani d . 1 . O
O2' 0.48390(15) 0.26479(14) 1.05847(10) 0.0324(3) Uani d . 1 . O
C11' 0.2115(2) -0.0022(2) 1.05924(17) 0.0357(5) Uani d . 1 . C
H11C 0.1360 0.0188 1.0309 0.043 Uiso calc R 1 . H
H11D 0.2796 0.0690 1.1276 0.043 Uiso calc R 1 . H
C12' 0.1402(3) -0.1430(3) 1.0678(2) 0.0536(7) Uani d . 1 . C
H12D 0.0752 -0.2130 0.9996 0.064 Uiso calc R 1 . H
H12E 0.0823 -0.1478 1.1112 0.064 Uiso calc R 1 . H
H12F 0.2160 -0.1615 1.0983 0.064 Uiso calc R 1 . H
C2' 0.2426(2) 0.1617(2) 0.88873(15) 0.0269(4) Uani d . 1 . C
H2'1 0.1981 0.1913 0.9331 0.032 Uiso calc R 1 . H
H2'2 0.2937 0.2390 0.8638 0.032 Uiso calc R 1 . H
O4' -0.00092(16) -0.10923(15) 0.80416(12) 0.0385(4) Uani d . 1 . O
P3' 0.09571(5) 0.01241(5) 0.77980(4) 0.02698(13) Uani d . 1 . P
O3' 0.01526(15) 0.08259(14) 0.72896(11) 0.0323(3) Uani d . 1 . O
C13' -0.1229(3) -0.0034(3) 0.6422(2) 0.0477(6) Uani d . 1 . C
H13C -0.1902 -0.0862 0.6562 0.057 Uiso calc R 1 . H
H13D -0.1049 -0.0363 0.5808 0.057 Uiso calc R 1 . H
C14' -0.1910(3) 0.0774(3) 0.6231(3) 0.0635(8) Uani d . 1 . C
H14D -0.2125 0.1064 0.6829 0.076 Uiso calc R 1 . H
H14E -0.2828 0.0196 0.5631 0.076 Uiso calc R 1 . H
H14F -0.1233 0.1601 0.6106 0.076 Uiso calc R 1 . H
C4' 0.1831(2) -0.0256(2) 0.69862(15) 0.0335(5) Uani d . 1 . C
H4'1 0.2305 0.0545 0.6754 0.040 Uiso calc R 1 . H
H4'2 0.1065 -0.1075 0.6373 0.040 Uiso calc R 1 . H
Si5' 0.32728(6) -0.06284(6) 0.76056(4) 0.02750(14) Uani d . 1 . Si
C6' 0.4571(2) 0.0873(2) 0.88416(15) 0.0252(4) Uani d . 1 . C
H6'1 0.5237 0.0632 0.9230 0.030 Uiso calc R 1 . H
H6'2 0.5187 0.1694 0.8670 0.030 Uiso calc R 1 . H
C15' 0.4320(3) -0.0613(3) 0.67570(19) 0.0464(6) Uani d . 1 . C
H15D 0.4997 -0.0906 0.7020 0.056 Uiso calc R 1 . H
H15E 0.4884 0.0332 0.6738 0.056 Uiso calc R 1 . H
H15F 0.3633 -0.1257 0.6064 0.056 Uiso calc R 1 . H
C16' 0.2392(3) -0.2321(2) 0.78245(19) 0.0417(5) Uani d . 1 . C
H16D 0.1822 -0.3084 0.7165 0.050 Uiso calc R 1 . H
H16E 0.1735 -0.2342 0.8189 0.050 Uiso calc R 1 . H
H16F 0.3155 -0.2430 0.8235 0.050 Uiso calc R 1 . H
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'
P P 0.1023 0.0942 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_publ_flag
C6 P1 C2 106.86(10) y
P3 C2 P1 117.47(11) y
C4 P3 C2 105.86(10) y
P3 C4 Si5 114.09(11) y
C6 Si5 C4 105.67(9) y
P1 C6 Si5 116.97(10) y
O2 P1 O1 113.87(9) ?
O2 P1 C6 116.26(9) ?
O1 P1 C6 100.96(9) ?
O2 P1 C2 111.45(9) ?
O1 P1 C2 106.48(9) ?
C11 O1 P1 119.30(15) ?
O1 C11 C12 109.3(2) ?
O4 P3 O3* 114.3(4) ?
O4 P3 O3 114.33(10) ?
O4 P3 C4 112.85(10) ?
O3* P3 C4 93.2(4) ?
O3 P3 C4 109.74(15) ?
O4 P3 C2 115.65(10) ?
O3* P3 C2 112.5(5) ?
O3 P3 C2 97.07(13) ?
C13 O3 P3 119.4(2) ?
O3 C13 C14 108.4(4) ?
C13* O3* P3 114.7(9) ?
O3* C13* C14* 107.9(16) ?
C16 Si5 C15 110.18(11) ?
C16 Si5 C6 113.28(10) ?
C15 Si5 C6 107.66(11) ?
C16 Si5 C4 110.50(11) ?
C15 Si5 C4 109.39(12) ?
C6' P1' C2' 106.28(9) y
P3' C2' P1' 116.71(11) y
C4' P3' C2' 105.47(10) y
P3' C4' Si5' 114.66(11) y
C6' Si5' C4' 106.39(9) y
P1' C6' Si5' 118.05(11) y
O2' P1' O1' 114.25(8) ?
O2' P1' C6' 116.64(9) ?
O1' P1' C6' 101.57(8) ?
O2' P1' C2' 110.35(9) ?
O1' P1' C2' 106.89(9) ?
C11' O1' P1' 119.59(13) ?
O1' C11' C12' 108.24(18) ?
O4' P3' O3' 114.17(9) ?
O4' P3' C4' 113.32(10) ?
O3' P3' C4' 107.73(9) ?
O4' P3' C2' 115.29(10) ?
O3' P3' C2' 99.61(9) ?
C13' O3' P3' 119.83(13) ?
O3' C13' C14' 109.8(2) ?
C16' Si5' C15' 111.75(12) ?
C16' Si5' C6' 111.78(10) ?
C15' Si5' C6' 108.17(11) ?
C16' Si5' C4' 110.65(11) ?
C15' Si5' C4' 107.86(11) ?
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
P1 O1 . 1.5935(17) ?
P1 O2 . 1.4761(15) ?
P1 C2 . 1.803(2) y
C2 P3 . 1.795(2) y
P3 C4 . 1.788(2) y
C4 Si5 . 1.893(2) y
Si5 C6 . 1.885(2) y
P1 C6 . 1.779(2) y
O1 C11 . 1.450(3) ?
C11 C12 . 1.461(4) ?
O4 P3 . 1.4788(16) ?
P3 O3* . 1.589(9) ?
P3 O3 . 1.609(2) ?
O3 C13 . 1.462(4) ?
C13 C14 . 1.466(6) ?
O3* C13* . 1.452(13) ?
C13* C14* . 1.469(17) ?
Si5 C16 . 1.851(2) ?
Si5 C15 . 1.865(2) ?
P1' O1' . 1.5889(15) ?
P1' O2' . 1.4787(16) ?
P1' C2' . 1.816(2) y
C2' P3' . 1.802(2) y
P3' C4' . 1.787(2) y
C4' Si5' . 1.899(2) y
Si5' C6' . 1.884(2) y
P1' C6' . 1.774(2) y
O1' C11' . 1.461(2) ?
C11' C12' . 1.481(3) ?
O4' P3' . 1.4773(16) ?
P3' O3' . 1.5959(14) ?
O3' C13' . 1.449(3) ?
C13' C14' . 1.466(3) ?
Si5' C16' . 1.856(2) ?
Si5' C15' . 1.856(2) ?
loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_site_symmetry_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
_geom_hbond_publ_flag
C6 H6A O1 2_666 0.99 2.51 3.493(3) 170.1 y
C11' H11D O2 1_556 0.99 2.58 3.551(3) 166.1 y
C13' H13C O2 2_556 0.99 2.41 3.357(3) 160.2 y
C15' H15D O2 2_656 0.98 2.52 3.423(3) 153.8 y
C16 H16C O2 2_666 0.98 2.53 3.509(3) 175.6 y
C6' H6'2 O4 2_666 0.99 2.43 3.309(3) 148.0 y
C6' H6'1 O1' 2_657 0.99 2.58 3.565(2) 174.0 y
C2 H2A O2' 1_554 0.99 2.25 3.236(3) 170.7 y
C16' H16F O2' 2_657 0.98 2.59 3.572(3) 176.7 y
C2 H2B O4' 2_556 0.99 2.56 3.410(3) 144.0 y
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_publ_flag
C6 P1 C2 P3 56.65(14) y
P1 C2 P3 C4 -60.55(14) y
C2 P3 C4 Si5 58.68(14) y
P3 C4 Si5 C6 -54.77(14) y
C4 Si5 C6 P1 51.63(14) y
C2 P1 C6 Si5 -51.73(14) y
O2 P1 O1 C11 58.65(19) ?
C6 P1 O1 C11 -176.00(18) ?
C2 P1 O1 C11 -64.58(19) ?
P1 O1 C11 C12 -174.7(2) ?
O2 P1 C2 P3 -175.34(11) ?
O1 P1 C2 P3 -50.61(14) ?
P1 C2 P3 O4 65.21(15) ?
P1 C2 P3 O3* -160.9(4) ?
P1 C2 P3 O3 -173.45(15) ?
O4 P3 O3 C13 -48.0(4) ?
O3* P3 O3 C13 46.4(11) ?
C4 P3 O3 C13 80.0(4) ?
C2 P3 O3 C13 -170.3(4) ?
P3 O3 C13 C14 162.4(3) ?
O4 P3 O3* C13* 34.9(14) ?
O3 P3 O3* C13* -59.7(13) ?
C4 P3 O3* C13* 151.7(12) ?
C2 P3 O3* C13* -99.7(12) ?
P3 O3* C13* C14* -178.8(17) ?
O4 P3 C4 Si5 -68.77(14) ?
O3* P3 C4 Si5 173.2(4) ?
O3 P3 C4 Si5 162.45(12) ?
P3 C4 Si5 C16 68.12(14) ?
P3 C4 Si5 C15 -170.42(12) ?
O2 P1 C6 Si5 -176.87(10) ?
O1 P1 C6 Si5 59.41(12) ?
C16 Si5 C6 P1 -69.47(14) ?
C15 Si5 C6 P1 168.45(12) ?
C6' P1' C2' P3' 58.39(14) y
P1' C2' P3' C4' -62.61(14) y
C2' P3' C4' Si5' 58.28(14) y
P3' C4' Si5' C6' -52.02(15) y
C4' Si5' C6' P1' 48.89(14) y
C2' P1' C6' Si5' -51.04(13) y
O2' P1' O1' C11' 53.47(17) ?
C6' P1' O1' C11' 179.93(15) ?
C2' P1' O1' C11' -68.90(16) ?
P1' O1' C11' C12' 179.32(17) ?
O2' P1' C2' P3' -174.27(10) ?
O1' P1' C2' P3' -49.50(13) ?
P1' C2' P3' O4' 63.19(14) ?
P1' C2' P3' O3' -174.17(11) ?
O4' P3' O3' C13' -50.0(2) ?
C4' P3' O3' C13' 76.82(19) ?
C2' P3' O3' C13' -173.41(18) ?
P3' O3' C13' C14' 167.77(19) ?
O4' P3' C4' Si5' -68.73(14) ?
O3' P3' C4' Si5' 163.97(10) ?
P3' C4' Si5' C16' 69.59(15) ?
P3' C4' Si5' C15' -167.89(13) ?
O2' P1' C6' Si5' -174.54(10) ?
O1' P1' C6' Si5' 60.60(12) ?
C16' Si5' C6' P1' -72.00(14) ?
C15' Si5' C6' P1' 164.55(12) ?
