#------------------------------------------------------------------------------
#$Date: 2008-01-26 17:25:03 +0000 (Sat, 26 Jan 2008) $
#$Revision: 20 $
#$URL: svn://www.crystallography.net/cod/cif/2/2004949.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_2004949
_journal_name_full  'Acta Crystallographica'
_journal_year       1996
_journal_volume    	C52
_journal_page_first    	1523
_journal_page_last    	1525
_publ_section_title
;
Cyclohexane-Linked Indenyl Rings in
5,8-Bis(trimethylsilyl)-6,7,12b,12c-tetrahydroindeno[2,1-c]fluorene
;
_chemical_formula_moiety    	'C26 H32 Si2'
_chemical_formula_sum    	'C26 H32 Si2'
_chemical_formula_weight    	400.71
_symmetry_cell_setting    	triclinic
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, -z'
_symmetry_space_group_name_H-M    	'P -1'
_cell_length_a    	10.082(2)
_cell_length_b    	10.912(2)
_cell_length_c    	12.228(2)
_cell_angle_alpha    	98.105(15)
_cell_angle_beta    	108.339(14)
_cell_angle_gamma    	106.541(15)
_cell_volume    	1184.1(4)
_cell_formula_units_Z    	2
_exptl_crystal_density_diffrn    	1.124
_exptl_crystal_density_meas    	'not measured'
_cell_measurement_temperature    	130(2)
loop_
_atom_site_label
_atom_site_occupancy
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si1 1 -0.35554(9) 0.31156(8) -0.28417(7) 0.0386(2)
Si2 1 0.02340(8) 0.11531(7) 0.32065(6) 0.0286(2)
C1 1 -0.1634(3) 0.3369(2) -0.1777(2) 0.0321(6)
C2 1 -0.0275(3) 0.3816(2) -0.2072(2) 0.0338(6)
C3 1 -0.0093(4) 0.4278(3) -0.3038(3) 0.0454(8)
H3A 1 -0.0927(34) 0.4257(30) -0.3671(28) 0.045
C4 1 0.1336(5) 0.4722(3) -0.3058(3) 0.0547(9)
H4A 1 0.1468(33) 0.5060(30) -0.3705(27) 0.045
C5 1 0.2552(4) 0.4718(3) -0.2146(3) 0.0511(9)
H5A 1 0.3536(36) 0.5024(30) -0.2129(27) 0.045
C6 1 0.2380(4) 0.4260(3) -0.1175(3) 0.0409(7)
H6A 1 0.3237(35) 0.4330(30) -0.0545(27) 0.045
C7 1 0.0965(3) 0.3796(2) -0.1147(2) 0.0322(6)
C8 1 0.0454(3) 0.3307(2) -0.0204(2) 0.0270(5)
H8A 1 0.1015(33) 0.3974(30) 0.0582(27) 0.045
C9 1 0.0559(3) 0.1949(2) -0.0008(2) 0.0263(5)
H9A 1 0.0120(33) 0.1343(30) -0.0756(28) 0.045
C10 1 0.2078(3) 0.1929(2) 0.0674(2) 0.0275(5)
C11 1 0.3312(3) 0.2068(3) 0.0362(3) 0.0339(6)
H11A 1 0.3276(32) 0.2221(29) -0.0410(27) 0.045
C12 1 0.4582(3) 0.1966(3) 0.1164(3) 0.0407(7)
H12A 1 0.5386(35) 0.2040(30) 0.0941(26) 0.045
C13 1 0.4609(3) 0.1700(3) 0.2232(3) 0.0402(7)
H13A 1 0.5483(35) 0.1643(29) 0.2757(27) 0.045
C14 1 0.3366(3) 0.1523(3) 0.2537(3) 0.0344(6)
H14A 1 0.3400(34) 0.1323(30) 0.3221(27) 0.045
C15 1 0.2099(3) 0.1645(2) 0.1760(2) 0.0262(5)
C16 1 0.0606(3) 0.1439(2) 0.1835(2) 0.0258(5)
C17 1 -0.0294(3) 0.1542(2) 0.0792(2) 0.0260(5)
C18 1 -0.1903(3) 0.1412(3) 0.0350(2) 0.0296(6)
H18A 1 -0.2392(34) 0.1176(30) 0.0863(27) 0.045
H18B 1 -0.2431(33) 0.0719(30) -0.0427(28) 0.045
C19 1 -0.2051(3) 0.2710(3) 0.0079(3) 0.0323(6)
H19A 1 -0.3058(36) 0.2605(29) -0.0270(26) 0.045
H19B 1 -0.1626(33) 0.3418(30) 0.0854(28) 0.045
C20 1 -0.1187(3) 0.3148(2) -0.0678(2) 0.0279(6)
C21 1 -0.3898(5) 0.1933(4) -0.4220(3) 0.0846(14)
H21A 1 -0.3692(20) 0.1165(8) -0.4030(4) 0.045
H21B 1 -0.3259(14) 0.2340(7) -0.4606(9) 0.045
H21C 1 -0.4921(7) 0.1676(14) -0.4744(7) 0.045
C22 1 -0.5079(4) 0.2392(4) -0.2306(4) 0.0730(12)
H22A 1 -0.4958(12) 0.2997(8) -0.1601(10) 0.045
H22B 1 -0.5032(13) 0.1573(9) -0.2128(15) 0.045
H22C 1 -0.6028(4) 0.2235(17) -0.2915(7) 0.045
C23 1 -0.3702(4) 0.4704(3) -0.3126(3) 0.0612(10)
H23A 1 -0.3637(20) 0.5259(7) -0.2413(6) 0.045
H23B 1 -0.4641(9) 0.4540(4) -0.3750(11) 0.045
H23C 1 -0.2904(12) 0.5138(9) -0.3361(15) 0.045
C24 1 -0.1585(4) 0.1242(4) 0.3187(3) 0.0534(9)
H24A 1 -0.2382(4) 0.0514(10) 0.2581(11) 0.045
H24B 1 -0.1665(9) 0.2058(8) 0.3021(15) 0.045
H24C 1 -0.1649(9) 0.1201(18) 0.3948(6) 0.045
C25 1 0.0299(5) -0.0491(3) 0.3402(3) 0.0578(10)
H25A 1 0.1191(10) -0.0583(7) 0.3333(16) 0.045
H25B 1 -0.0557(11) -0.1174(3) 0.2800(10) 0.045
H25C 1 0.0298(21) -0.0566(7) 0.4175(7) 0.045
C26 1 0.1692(4) 0.2482(3) 0.4503(3) 0.0535(9)
H26A 1 0.2660(4) 0.2490(12) 0.4541(9) 0.045
H26B 1 0.1562(13) 0.2324(10) 0.5221(3) 0.045
H26C 1 0.1607(13) 0.3321(4) 0.4416(8) 0.045