data_2008352
_journal_name_full  'Acta Crystallographica'
_journal_year  1999
_journal_volume  C55
_journal_page_first  630
_journal_page_last  632
_publ_section_title
;
(E)-Dimethyl 4-isopropyl-3-[tris(trimethylsilyl)silylmethylene]-1,1-
cyclohexanedicarboxylate
;
loop_
_publ_author_name
  'Moreno-Fuquen, Rodolfo'
  'Jaramillo-G\'omez, Luz Marina'
  'Mart\'in-Franco,  Jaime'
_chemical_formula_sum  'C23 H48 Si4 O4'
_chemical_formula_weight  500.97
_symmetry_cell_setting  monoclinic
_symmetry_space_group_name_H-M  'P 21/n'
loop_
_symmetry_equiv_pos_as_xyz
  'x, y, z'
  'x+1/2, -y+1/2, z+1/2'
  '-x, -y, -z'
  '-x-1/2, y-1/2, -z-1/2'
_cell_length_a  9.6682(9)
_cell_length_b  33.169(2)
_cell_length_c  9.9711(8)
_cell_angle_alpha  90.00
_cell_angle_beta  98.820(10)
_cell_angle_gamma  90.00
_cell_volume  3159.8(4)
_cell_formula_units_Z  4
_cell_measurement_temperature  293(2)
_exptl_crystal_density_diffrn  1.053
_refine_ls_R_factor_obs  0.0534
_refine_ls_wR_factor_obs  0.1350
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
  Si1 0.79425(9) 0.14935(2) 0.95526(8) 0.0419(2) Uani d . 1 . Si
  Si2 0.70596(11) 0.10808(3) 0.76855(10) 0.0573(3) Uani d . 1 . Si
  Si3 0.92530(11) 0.20193(3) 0.87766(11) 0.0651(3) Uani d . 1 . Si
  Si4 0.61534(12) 0.17859(3) 1.05953(12) 0.0664(3) Uani d . 1 . Si
  O1 0.5533(2) 0.03326(9) 1.2370(2) 0.0690(7) Uani d . 1 . O
  O2 0.6699(3) 0.02188(12) 1.4401(3) 0.1060(13) Uani d . 1 . O
  O3 0.7878(4) 0.02339(8) 1.0217(2) 0.0840(9) Uani d . 1 . O
  O4 0.7942(3) -0.02628(7) 1.1702(2) 0.0591(6) Uani d . 1 . O
  C1 0.9319(3) 0.09994(8) 1.1847(3) 0.0392(6) Uani d . 1 . C
  C2 1.0632(3) 0.08787(9) 1.2808(3) 0.0447(7) Uani d . 1 . C
  H2 1.1435 0.09353 1.2346 0.076 Uiso calc R 1 . H
  C3 1.0617(3) 0.04231(9) 1.3072(3) 0.0467(7) Uani d . 1 . C
  H31 1.0674 0.02803 1.2233 0.076 Uiso calc R 1 . H
  H32 1.1431 0.03508 1.3722 0.076 Uiso calc R 1 . H
  C4 0.9303(3) 0.02929(9) 1.3614(3) 0.0448(7) Uani d . 1 . C
  H41 0.9257 0.04294 1.4466 0.076 Uiso calc R 1 . H
  H42 0.9341 0.00050 1.3786 0.076 Uiso calc R 1 . H
  C5 0.7983(3) 0.03920(9) 1.2599(3) 0.0389(6) Uani d . 1 . C
  C6 0.7959(3) 0.08413(9) 1.2206(3) 0.0432(7) Uani d . 1 . C
  H61 0.7228 0.08827 1.1436 0.076 Uiso calc R 1 . H
  H62 0.7716 0.09983 1.2957 0.076 Uiso calc R 1 . H
  C7 0.9358(3) 0.12409(8) 1.0782(3) 0.0407(6) Uani d . 1 . C
  H7 1.0259 0.12953 1.0613 0.076 Uiso calc R 1 . H
  C8 0.6680(3) 0.03028(10) 1.3250(3) 0.0482(7) Uani d . 1 . C
  C9 0.4216(4) 0.02821(15) 1.2884(5) 0.0845(14) Uani d . 1 . C
  H91 0.3478 0.0236 1.2140 0.076 Uiso calc R 1 . H
  H92 0.4017 0.0521 1.336 0.076 Uiso calc R 1 . H
  H93 0.4284 0.0056 1.349 0.076 Uiso calc R 1 . H
  C10 0.7921(3) 0.01235(9) 1.1351(3) 0.0456(7) Uani d . 1 . C
  C11 0.7917(5) -0.05551(12) 1.0633(4) 0.0787(12) Uani d . 1 . C
  H111 0.794 -0.08216 1.1011 0.076 Uiso calc R 1 . H
  H112 0.8716 -0.0516 1.0182 0.076 Uiso calc R 1 . H
  H113 0.7076 -0.0522 0.9992 0.076 Uiso calc R 1 . H
  C12 1.0812(4) 0.11369(10) 1.4128(3) 0.0559(8) Uani d . 1 . C
  H12 0.9959(4) 0.11080(10) 1.4538(3) 0.076 Uiso calc R 1 . H
  C13 1.2042(5) 0.10023(15) 1.5170(4) 0.0915(14) Uani d . 1 . C
  H131 1.1877 0.0734 1.5466 0.076 Uiso calc R 1 . H
  H132 1.2142 0.1182 1.5934 0.076 Uiso calc R 1 . H
  H133 1.2882 0.1006 1.4767 0.076 Uiso calc R 1 . H
  C14 1.0981(6) 0.15788(13) 1.3812(5) 0.096(2) Uani d . 1 . C
  H141 1.0179 0.1669 1.3197 0.076 Uiso calc R 1 . H
  H142 1.1809 0.1615 1.340 0.076 Uiso calc R 1 . H
  H143 1.106 0.17324 1.4636 0.076 Uiso calc R 1 . H
  C15 0.5458(4) 0.08058(14) 0.7979(5) 0.0912(14) Uani d . 1 . C
  H151 0.4737 0.09962 0.810 0.076 Uiso calc R 1 . H
  H152 0.5666 0.0643 0.8781 0.076 Uiso calc R 1 . H
  H153 0.5142 0.0636 0.7213 0.076 Uiso calc R 1 . H
  C16 0.8432(4) 0.07150(12) 0.7368(4) 0.0733(11) Uani d . 1 . C
  H161 0.9230 0.08588 0.715 0.076 Uiso calc R 1 . H
  H162 0.8068 0.0543 0.6623 0.076 Uiso calc R 1 . H
  H163 0.8706 0.0555 0.8166 0.076 Uiso calc R 1 . H
  C17 0.6556(7) 0.1389(2) 0.6122(5) 0.119(2) Uani d . 1 . C
  H171 0.7363 0.1530 0.5910 0.076 Uiso calc R 1 . H
  H172 0.5850 0.1581 0.6271 0.076 Uiso calc R 1 . H
  H173 0.620 0.1216 0.5379 0.076 Uiso calc R 1 . H
  C18 1.0697(6) 0.1793(2) 0.8004(7) 0.130(2) Uani d . 1 . C
  H181 1.0314 0.1627 0.7249 0.076 Uiso calc R 1 . H
  H182 1.1272 0.1631 0.8667 0.076 Uiso calc R 1 . H
  H183 1.1253 0.2003 0.770 0.076 Uiso calc R 1 . H
  C19 1.0072(8) 0.2327(2) 1.0197(6) 0.165(3) Uani d . 1 . C
  H191 1.064 0.2159 1.0845 0.076 Uiso calc R 1 . H
  H192 0.9360 0.2454 1.0622 0.076 Uiso calc R 1 . H
  H193 1.065 0.2530 0.9870 0.076 Uiso calc R 1 . H
  C20 0.8262(5) 0.2364(2) 0.7530(6) 0.117(2) Uani d . 1 . C
  H201 0.7483 0.2474 0.7901 0.076 Uiso calc R 1 . H
  H202 0.792 0.2218 0.6714 0.076 Uiso calc R 1 . H
  H203 0.8862 0.2579 0.733 0.076 Uiso calc R 1 . H
  C21 0.4792(5) 0.1445(2) 1.1054(6) 0.111(2) Uani d . 1 . C
  H211 0.5186 0.1278 1.1801 0.076 Uiso calc R 1 . H
  H212 0.4442 0.1279 1.0289 0.076 Uiso calc R 1 . H
  H213 0.4039 0.1602 1.131 0.076 Uiso calc R 1 . H
  C22 0.6940(7) 0.2024(2) 1.2218(6) 0.142(3) Uani d . 1 . C
  H221 0.752 0.1832 1.2758 0.076 Uiso calc R 1 . H
  H222 0.6210 0.2112 1.2703 0.076 Uiso calc R 1 . H
  H223 0.749 0.2252 1.2033 0.076 Uiso calc R 1 . H
  C23 0.5212(6) 0.2163(2) 0.9429(6) 0.129(2) Uani d . 1 . C
  H231 0.5828 0.2384 0.932 0.076 Uiso calc R 1 . H
  H232 0.4416 0.2261 0.9799 0.076 Uiso calc R 1 . H
  H233 0.490 0.2040 0.8563 0.076 Uiso calc R 1 . H
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
  Si1 0.0435(4) 0.0394(4) 0.0426(4) -0.0001(3) 0.0059(3) 0.0054(3)
  Si2 0.0586(6) 0.0607(6) 0.0486(5) -0.0030(5) -0.0044(4) -0.0007(4)
  Si3 0.0630(6) 0.0588(6) 0.0702(7) -0.0144(5) -0.0004(5) 0.0227(5)
  Si4 0.0625(6) 0.0599(6) 0.0790(7) 0.0194(5) 0.0177(5) 0.0002(5)
  O1 0.0351(12) 0.113(2) 0.0602(14) 0.0032(12) 0.0113(11) 0.0290(14)
  O2 0.068(2) 0.204(4) 0.0465(15) -0.038(2) 0.0129(13) 0.029(2)
  O3 0.141(3) 0.073(2) 0.0381(13) -0.017(2) 0.0144(15) 0.0055(12)
  O4 0.074(2) 0.0513(13) 0.0524(13) 0.0002(11) 0.0124(12) -0.0016(10)
  C1 0.0370(15) 0.0408(15) 0.0399(15) 0.0015(12) 0.0065(12) 0.0003(12)
  C2 0.0350(15) 0.053(2) 0.045(2) -0.0009(13) 0.0043(12) 0.0052(13)
  C3 0.038(2) 0.052(2) 0.048(2) 0.0048(13) 0.0009(13) 0.0054(14)
  C4 0.044(2) 0.051(2) 0.0381(15) 0.0011(13) 0.0014(12) 0.0095(12)
  C5 0.0370(15) 0.046(2) 0.0350(14) -0.0002(12) 0.0080(11) 0.0088(12)
  C6 0.0358(15) 0.048(2) 0.045(2) 0.0012(12) 0.0060(12) 0.0085(13)
  C7 0.0389(15) 0.043(2) 0.0407(15) -0.0011(12) 0.0089(12) 0.0024(12)
  C8 0.045(2) 0.059(2) 0.042(2) -0.0087(14) 0.0110(13) 0.0044(14)
  C9 0.039(2) 0.121(4) 0.099(3) 0.004(2) 0.028(2) 0.025(3)
  C10 0.043(2) 0.054(2) 0.039(2) -0.0044(13) 0.0056(13) 0.0050(13)
  C11 0.100(3) 0.064(2) 0.073(3) -0.003(2) 0.016(2) -0.015(2)
  C12 0.053(2) 0.063(2) 0.050(2) -0.002(2) -0.0001(15) 0.000(2)
  C13 0.091(3) 0.101(3) 0.070(3) 0.012(3) -0.028(2) -0.015(2)
  C14 0.133(4) 0.068(3) 0.077(3) -0.013(3) -0.014(3) -0.009(2)
  C15 0.065(3) 0.084(3) 0.119(4) -0.013(2) -0.001(3) -0.019(3)
  C16 0.081(3) 0.079(3) 0.062(2) -0.008(2) 0.020(2) -0.016(2)
  C17 0.165(6) 0.100(4) 0.075(3) -0.003(4) -0.041(3) 0.012(3)
  C18 0.102(4) 0.111(4) 0.193(6) -0.006(3) 0.074(4) 0.053(4)
  C19 0.228(8) 0.143(5) 0.112(5) -0.128(6) -0.010(5) 0.019(4)
  C20 0.088(3) 0.104(4) 0.153(5) -0.017(3) -0.006(3) 0.077(4)
  C21 0.091(4) 0.106(4) 0.154(5) 0.028(3) 0.071(4) 0.015(4)
  C22 0.124(5) 0.161(6) 0.144(5) 0.030(4) 0.031(4) -0.078(5)
  C23 0.108(4) 0.129(5) 0.160(5) 0.068(4) 0.051(4) 0.058(4)
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
  Si1 C7 . 1.888(3) yes
  Si1 Si3 . 2.3551(12) yes
  Si1 Si4 . 2.3590(13) yes
  Si1 Si2 . 2.3625(13) yes
  Si2 C15 . 1.859(4) ?
  Si2 C16 . 1.861(4) ?
  Si2 C17 . 1.866(4) ?
  Si3 C19 . 1.825(5) ?
  Si3 C20 . 1.845(4) ?
  Si3 C18 . 1.854(5) ?
  Si4 C21 . 1.845(5) ?
  Si4 C23 . 1.850(5) ?
  Si4 C22 . 1.856(6) ?
  O1 C8 . 1.308(4) ?
  O1 C9 . 1.453(4) ?
  O2 C8 . 1.179(4) ?
  O3 C10 . 1.183(4) ?
  O4 C10 . 1.327(4) ?
  O4 C11 . 1.438(4) ?
  C1 C7 . 1.335(4) yes
  C1 C6 . 1.509(4) ?
  C1 C2 . 1.522(4) ?
  C2 C3 . 1.535(4) ?
  C2 C12 . 1.558(4) yes
  C3 C4 . 1.518(4) ?
  C4 C5 . 1.538(4) ?
  C5 C10 . 1.524(4) ?
  C5 C8 . 1.532(4) ?
  C5 C6 . 1.540(4) ?
  C12 C14 . 1.513(5) ?
  C12 C13 . 1.521(5) ?