#------------------------------------------------------------------------------
#$Date: 2012-02-03 17:16:24 +0000 (Fri, 03 Feb 2012) $
#$Revision: 32112 $
#$URL: svn://www.crystallography.net/cod/cif/2/10/38/2103850.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_2103850
loop_
_publ_author_name
'Wunschel, Markus'
'Dinnebier, Robert E.'
'Carlson, Stefan'
'Bernatowicz, Piotr'
'van Smaalen, Sander'
_publ_section_title
;
 Influence of the molecular structures on the high-pressure and
 low-temperature phase transitions of plastic crystals
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              60
_journal_page_last               71
_journal_volume                  59
_journal_year                    2003
_chemical_formula_moiety         'C13 H36 Si4'
_chemical_formula_structural     Si[Si(CH3)3]3[C(CH3)3]1
_chemical_formula_sum            'C13 H36 Si4'
_chemical_formula_weight         304.8
_chemical_name_common
;
Tert-butyl-tris(trimethylsilyl)silane
;
_chemical_name_systematic        ' ?'
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2n'
_symmetry_space_group_name_H-M   'P 1 1 21/n'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                109.477(4)
_cell_formula_units_Z            8
_cell_length_a                   17.3170(10)
_cell_length_b                   15.5980(10)
_cell_length_c                   16.3850(10)
_cell_measurement_temperature    105
_cell_volume                     4172.5(5)
_computing_cell_refinement       JANA2000
_computing_data_collection       'SPEC package ESRF '
_computing_publication_material  JANA2000
_computing_structure_refinement  JANA2000
_computing_structure_solution    DASH
_diffrn_ambient_temperature      105
_diffrn_measurement_device_type  two-circle
_diffrn_radiation_monochromator  Si(111)
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.399828(2)
_exptl_absorpt_coefficient_mu    0.22
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    0.9703(2)
_exptl_crystal_density_meas      'not measured'
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1245
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.58
_refine_ls_hydrogen_treatment    undef
_refine_ls_number_constraints    73
_refine_ls_number_parameters     60
_refine_ls_number_restraints     6
_refine_ls_R_factor_all          0.068
_refine_ls_R_factor_gt           0.048
_refine_ls_structure_factor_coef Inet
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_gt          0.050
_refine_ls_wR_factor_ref         0.065
_[local]_cod_data_source_file    os0101.cif
_[local]_cod_data_source_block   1
_[local]_cod_cif_authors_sg_H-M  P_1_1_21/n
_cod_original_cell_volume        4172.7(5)
_cod_database_code               2103850
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
1 x,y,z
2 1/2-x,1/2-y,1/2+z
3 -x,-y,-z
4 1/2+x,1/2+y,1/2-z
loop_
_atom_type_symbol
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Si 0.082 0.070 'International Tables Vol C Tables  4.2.6.8 and 6.1.1.1'
C 0.003 0.002 'International Tables Vol C Tables  4.2.6.8 and 6.1.1.1'
H 0.000 0.000 'International Tables Vol C Tables  4.2.6.8 and 6.1.1.1'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_calc_flag
_atom_site_occupancy
_atom_site_type_symbol
Si0a 0.1553(7) 0.2422(9) 0.3867(8) 0.073(7) Uiso d 1.0 Si
C11a 0.1151(8) 0.2906(10) 0.4739(9) 0.037(4) Uiso d 0.507 C
C111a 0.1881(11) 0.3779(12) 0.5095(10) 0.041(6) Uiso d 0.659 C
C111/1a 0.0395(9) 0.3220(10) 0.4423(11) 0.041(6) Uiso d 0.659 C
C111/2a 0.0833(11) 0.2134(12) 0.5444(11) 0.041(6) Uiso d 0.659 C
C11d 0.1776(8) 0.1412(11) 0.4259(8) 0.037(4) Uiso d 0.493 C
C111d 0.1259(9) 0.0525(13) 0.3729(10) 0.041(6) Uiso d 0.641 C
C111/1d 0.2752(11) 0.1588(12) 0.4169(9) 0.041(6) Uiso d 0.641 C
C111/2d 0.1509(11) 0.1262(13) 0.5214(10) 0.041(6) Uiso d 0.641 C
Si0e 0.3431(9) 0.7714(12) 0.6135(9) 0.073(7) Uiso d 1.0 Si
C11e 0.2856(10) 0.8454(12) 0.5771(9) 0.037(4) Uiso d 0.506 C
C111e 0.2128(11) 0.8399(13) 0.6418(11) 0.041(6) Uiso d 0.6574 C
C111/1e 0.3480(12) 0.9494(14) 0.5705(9) 0.041(6) Uiso d 0.6574 C
C111/2e 0.2466(12) 0.8100(15) 0.4880(11) 0.041(6) Uiso d 0.6574 C
C11f 0.2720(10) 0.6622(13) 0.6534(9) 0.037(4) Uiso d 0.278 C
C111f 0.1929(12) 0.6800(14) 0.6938(9) 0.041(6) Uiso d 0.3614 C
C111/1f 0.2430(10) 0.5902(14) 0.5784(12) 0.041(6) Uiso d 0.3614 C
C111/2f 0.3193(11) 0.6229(14) 0.7220(12) 0.041(6) Uiso d 0.3614 C
C11g 0.4012(10) 0.7291(12) 0.5373(9) 0.037(4) Uiso d 0.216 C
C111g 0.4232(10) 0.6443(14) 0.5765(11) 0.041(6) Uiso d 0.2812 C
C111/1g 0.3450(12) 0.6959(12) 0.4562(11) 0.041(6) Uiso d 0.2812 C
C111/2g 0.4850(12) 0.8110(13) 0.5141(12) 0.041(6) Uiso d 0.2812 C
Si21a 0.1042(8) 0.3038(9) 0.4975(9) 0.037(4) Uiso d 0.493 Si
C211a 0.1774(8) 0.3186(9) 0.5895(9) 0.041(6) Uiso d 0.641 C
C211/1a 0.0973(8) 0.4205(10) 0.4664(9) 0.041(6) Uiso d 0.641 C
C211/2a -0.0034(8) 0.2221(10) 0.5264(9) 0.041(6) Uiso d 0.641 C
Si21b 0.0586(8) 0.2008(9) 0.2797(8) 0.037(4) Uiso d 1.0 Si
C211b 0.0577(8) 0.3091(11) 0.2230(9) 0.041(6) Uiso d 1.3 C
C211/1b 0.0885(8) 0.1213(10) 0.2049(9) 0.041(6) Uiso d 1.3 C
C211/2b -0.0487(8) 0.1384(10) 0.3247(9) 0.041(6) Uiso d 1.3 C
Si21c 0.2749(8) 0.3427(10) 0.3261(8) 0.037(4) Uiso d 1.0 Si
C211c 0.2538(8) 0.4507(10) 0.2897(8) 0.041(6) Uiso d 1.3 C
C211/1c 0.3624(8) 0.3754(10) 0.4056(9) 0.041(6) Uiso d 1.3 C
C211/2c 0.3054(9) 0.2834(10) 0.2340(9) 0.041(6) Uiso d 1.3 C
Si21d 0.1837(7) 0.1139(10) 0.4365(8) 0.037(4) Uiso d 0.507 Si
C211d 0.0825(9) 0.0224(10) 0.4697(8) 0.041(6) Uiso d 0.659 C
C211/1d 0.2349(8) 0.0661(10) 0.3513(9) 0.041(6) Uiso d 0.659 C
C211/2d 0.2567(8) 0.1495(10) 0.5290(9) 0.041(6) Uiso d 0.659 C
Si21e 0.2700(9) 0.8654(12) 0.5673(9) 0.037(4) Uiso d 0.494 Si
C211e 0.2585(9) 0.9420(12) 0.6560(10) 0.041(6) Uiso d 0.6426 C
C211/1e 0.3293(10) 0.9402(12) 0.4784(9) 0.041(6) Uiso d 0.6426 C
C211/2e 0.1629(10) 0.7903(12) 0.5300(10) 0.041(6) Uiso d 0.6426 C
Si21f 0.2527(9) 0.6326(12) 0.6642(9) 0.037(4) Uiso d 0.722 Si
C211f 0.2169(9) 0.6517(12) 0.7723(10) 0.041(6) Uiso d 0.9386 C
C211/1f 0.1591(10) 0.5892(12) 0.5924(9) 0.041(6) Uiso d 0.9386 C
C211/2f 0.3089(10) 0.5444(12) 0.6688(10) 0.041(6) Uiso d 0.9386 C
Si21g 0.4169(9) 0.7177(12) 0.5167(9) 0.037(4) Uiso d 0.784 Si
C211g 0.4610(9) 0.6328(12) 0.5689(10) 0.041(6) Uiso d 1.0188 C
C211/1g 0.3442(10) 0.6574(12) 0.4292(9) 0.041(6) Uiso d 1.0188 C
C211/2g 0.5054(10) 0.8192(12) 0.4736(10) 0.041(6) Uiso d 1.0188 C
Si21h 0.4368(9) 0.8365(12) 0.7193(9) 0.037(4) Uiso d 1.0 Si
C211h 0.3770(10) 0.8406(12) 0.8180(10) 0.041(6) Uiso d 1.3 C
C211/1h 0.5060(10) 0.7633(12) 0.7371(9) 0.041(6) Uiso d 1.3 C
C211/2h 0.5034(10) 0.9584(12) 0.6884(9) 0.041(6) Uiso d 1.3 C
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_publ_flag
Si0a C11a 1.86(2) yes
Si0a C11d 1.86(2) yes
Si0a Si21a 2.36(2) yes
Si0a Si21b 2.359(18) yes
Si0a Si21c 2.359(17) yes
Si0a Si21d 2.36(2) yes
C11a C111a 1.63(2) yes
C11a C111/1a 1.63(2) yes
C11a C111/2a 1.63(2) yes
C11d C111d 1.63(2) yes
C11d C111/1d 1.63(2) yes
C11d C111/2d 1.63(2) yes
Si0e C11e 1.86(3) yes
Si0e C11f 1.86(2) yes
Si0e C11g 1.86(2) yes
Si0e Si21e 2.36(3) yes
Si0e Si21f 2.36(2) yes
Si0e Si21g 2.36(2) yes
Si0e Si21h 2.36(2) yes
C11e C111e 1.63(3) yes
C11e C111/1e 1.63(2) yes
C11e C111/2e 1.63(2) yes
C11f C111f 1.63(3) yes
C11f C111/1f 1.63(3) yes
C11f C111/2f 1.63(3) yes
C11g C111g 1.63(3) yes
C11g C111/1g 1.63(2) yes
C11g C111/2g 1.63(2) yes
Si21a C211a 1.93(2) yes
Si21a C211/1a 1.93(2) yes
Si21a C211/2a 1.933(17) yes
Si21b C211b 1.93(2) yes
Si21b C211/1b 1.93(2) yes
Si21b C211/2b 1.933(18) yes
Si21c C211c 1.93(2) yes
Si21c C211/1c 1.93(2) yes
Si21c C211/2c 1.93(2) yes
Si21d C211d 1.933(17) yes
Si21d C211/1d 1.93(2) yes
Si21d C211/2d 1.933(19) yes
Si21e C211e 1.93(2) yes
Si21e C211/1e 1.93(2) yes
Si21e C211/2e 1.93(2) yes
Si21f C211f 1.93(2) yes
Si21f C211/1f 1.93(2) yes
Si21f C211/2f 1.93(3) yes
Si21g C211g 1.93(3) yes
Si21g C211/1g 1.93(2) yes
Si21g C211/2g 1.93(2) yes
Si21h C211h 1.93(2) yes
Si21h C211/1h 1.93(3) yes
Si21h C211/2h 1.93(2) yes
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
C11a Si0a C11d 106.9(9) yes
C11a Si0a Si21a 0 yes
C11a Si0a Si21b 110.8(9) yes
C11a Si0a Si21c 114.7(8) yes
C11a Si0a Si21d 106.9(8) yes
C11d Si0a Si21a 106.9(8) yes
C11d Si0a Si21b 110.8(8) yes
C11d Si0a Si21c 108.9(8) yes
C11d Si0a Si21d 0 yes
Si21a Si0a Si21b 110.8(8) yes
Si21a Si0a Si21c 114.7(7) yes
Si21a Si0a Si21d 106.9(7) yes
Si21b Si0a Si21c 104.8(7) yes
Si21b Si0a Si21d 110.8(7) yes
Si21c Si0a Si21d 108.9(8) yes
C111a C11a C111/1a 110.0(13) yes
C111a C11a C111/2a 110.0(12) yes
C111/1a C11a C111/2a 110.0(12) yes
C111d C11d C111/1d 110.0(13) yes
C111d C11d C111/2d 110.0(11) yes
C111/1d C11d C111/2d 110.0(12) yes
C11e Si0e C11f 110.7(11) yes
C11e Si0e C11g 118.1(10) yes
C11e Si0e Si21e 0 yes
C11e Si0e Si21f 110.7(9) yes
C11e Si0e Si21g 118.1(9) yes
C11e Si0e Si21h 113.8(10) yes
C11f Si0e C11g 100.5(11) yes
C11f Si0e Si21e 110.7(10) yes
C11f Si0e Si21f 0 yes
C11f Si0e Si21g 100.5(10) yes
C11f Si0e Si21h 106.7(9) yes
C11g Si0e Si21e 118.1(10) yes
C11g Si0e Si21f 100.5(10) yes
C11g Si0e Si21g 0 yes
C11g Si0e Si21h 105.7(10) yes
Si21e Si0e Si21f 110.7(8) yes
Si21e Si0e Si21g 118.1(8) yes
Si21e Si0e Si21h 113.8(9) yes
Si21f Si0e Si21g 100.5(9) yes
Si21f Si0e Si21h 106.7(8) yes
Si21g Si0e Si21h 105.7(8) yes
C111e C11e C111/1e 110.0(14) yes
C111e C11e C111/2e 110.0(13) yes
C111/1e C11e C111/2e 110.0(12) yes
C111f C11f C111/1f 110.0(12) yes
C111f C11f C111/2f 110.0(13) yes
C111/1f C11f C111/2f 110.0(16) yes
C111g C11g C111/1g 110.0(14) yes
C111g C11g C111/2g 110.0(14) yes
C111/1g C11g C111/2g 110.0(13) yes
C211a Si21a C211/1a 109.7(9) yes
C211a Si21a C211/2a 109.7(9) yes
C211/1a Si21a C211/2a 109.7(10) yes
C211b Si21b C211/1b 109.7(9) yes
C211b Si21b C211/2b 109.7(10) yes
C211/1b Si21b C211/2b 109.7(9) yes
C211c Si21c C211/1c 109.7(9) yes
C211c Si21c C211/2c 109.7(9) yes
C211/1c Si21c C211/2c 109.7(10) yes
C211d Si21d C211/1d 109.7(9) yes
C211d Si21d C211/2d 109.7(9) yes
C211/1d Si21d C211/2d 109.7(9) yes
C211e Si21e C211/1e 109.7(11) yes
C211e Si21e C211/2e 109.7(11) yes
C211/1e Si21e C211/2e 109.7(10) yes
C211f Si21f C211/1f 109.7(10) yes
C211f Si21f C211/2f 109.7(11) yes
C211/1f Si21f C211/2f 109.7(11) yes
C211g Si21g C211/1g 109.7(11) yes
C211g Si21g C211/2g 109.7(11) yes
C211/1g Si21g C211/2g 109.7(10) yes
C211h Si21h C211/1h 109.7(11) yes
C211h Si21h C211/2h 109.7(11) yes
C211/1h Si21h C211/2h 109.7(10) yes