Synthese und Strukturen von achtgliedrigen Bor‐ und Germanium‐haltigen Siloxanringen und eines Bicycloheptanderivats mit Silicium, Zinn und Sauerstoff als Ringbausteinen

Abstract

Die Reaktionen von (t‐Bu)2Si(OH)2 mit PhBCl2 und GeCl4 führen im molaren Verhältnis 1:1 zur Bildung von 1,3,5,7‐Tetraoxa‐2,6‐disila‐4,8‐diborocin 1 und 1,3,5,7‐Tetraoxa‐2,6‐disila‐4,8‐digermocin 2. Durch Umsetzung von SnCl4 mit (t‐Bu)2Si(OH)2 in CH2Cl2 wurde μ‐OO′‐Di(t‐butyl) silandiyl‐dihydroxo‐di‐μ‐hydroxo‐hexachlorodistannan 3 dargestellt. Die Röntgenstrukturanalysen von 1 und 2 zeigen das Vorliegen achtgliedriger Bor‐ und Germanium‐Silicium‐Sauerstoff‐Ringe. 1 und 2 kristallisieren in der triklinen Raumgruppe P1 mit a = 8,727(2), b = 9,523(3), c = 9,816(4) Å; α = 91,81(2), β = 100,76(3), γ = 116,90(1)° und a = 8,297(2), b = 9,325(2), c = 10,900(2) Å; α = 72,36(1), β = 77,48(1), γ = 88,31(1)°. Die Röntgenstrukturanalyse von 3 zeigt einen [3.1.1] bicycloheptanartigen Aufbau. 3 kristallisiert in der monoklinen Raumgruppe P21/c mit a = 15,185(3), b = 14,302(3), c = 22,825(5) Å; β = 90,84(3)°.

Vibrational study of tin-containing siloxane ring compounds

“…18 The crystallographic data for compound 1 are summarized in Table 1. Vibrational spectroscopy Infrared spectra were recorded with a spectral resolution of 2 cm~1 using a Bomen MB100 Fourier transform instrument.…”

Germanium Coordination Compounds: Classification and Analysis of Crystallographic and Structural Data

“…The structure of a complex anion [125] is shown in Figure 9. [7,126,127] in which a pair of bidentate ligands. [7,126,127] in which a pair of bidentate ligands.…”

“…The anion is formed conceptually by the linking of two GeSe units with one Ο atom and two ChSiMe3 bridges, giving a GeChSe chromophore. (PhO) 2 PNO using Ν and Ο [7], BU2S1O2 [126] and Me 2 SN 2 [127] bridge two L?Ge moieties. (PhO) 2 PNO using Ν and Ο [7], BU2S1O2 [126] and Me 2 SN 2 [127] bridge two L?Ge moieties.…”

A Novel Borosilicate Cage Compound with an Incomplete B4Si4 Cube Structure: [(tBuSi)4(CH2=CHC6H4B)4O10]

“…This contrasts with the configurations found in the {B 2 Si 2 O 4 } rings in (PhBO) 2 (Ph 2 SiO) 2 [14] and (PhBO) 2 -(tBu 2 SiO) 2 . [15] In the former compound the {B 2 Si 2 O 4 } ring is essentially planar with maximum deviations from the mean plane of 0.137 for O2 and À 0.025 for B1. [14] In the latter compound the {B 2 Si 2 O 4 } ring lies about an inversion center.…”

“…Hydrogen atoms are omitted for clarity. Selected bond lengths [] and angles[8]: Si1-O2 1.609(2), Si1-O8 1.620(2), Si1-O9 1.603(2), Si1-C1 1.843(3), B3-O2 1.361(4), B3-O4 1.367(4), B3-C11 1.541(4), Si5-O4 1.619(2), Si5-O6 1.616(2), Si5-O9a 1.611(2) [atom O9a is at equivalent position À x, À y, À z], Si5-C5 1.847(3), B7-O6 1.369(4), B7-O8 1.366(4), B7-C21 1.536(5); O2-Si1-O8 112.51(12), O2-Si1-O9 107.02(12), O2-Si1-C1 110.08(15), O8-Si1-O9 107.42(12), O8-Si1-C1 109.85(14), O9-Si1-C1 109.87(13), Si1-O2-B3 154.4(2), O2-B3-O4 120.7(3), O2-B3-C11 120.6(3), O4-B3-C11 118.7(3), B3-O4-Si5 137.5(2), O4-Si5-O6 110.23(12), O4-Si5-C5 108.59…”