Unexpected Formation of a Silicon-Centered Spirocyclic Oligosiloxane Bearing Eight Pendant Ferrocene Units

An intriguing but rare silicon-centered spirocyclic compound, spiro[5.5]octaferrocenylpentasiloxane (4) featuring silicon fused six-membered ferrocenyl-functionalized siloxane rings, has been obtained during the thermally induced transformation of triferrocenylsilane Fc3Si–H (1) into triferrocenylsi...

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Published inCrystals (Basel) Vol. 12; no. 8; p. 1122
Main Authors Bruña, Sonia, Cuadrado, Isabel, Perles, Josefina
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2022
Subjects
Carbonyls
Catalysis
Chemical properties
Chemistry
Chromatography
Crystal structure
cyclosiloxanes
Diffraction
Dimethylformamide
ferrocene
inorganic macrocycles
Iron compounds
Jewelry
Mass spectrometry
Metallocenes
SCXRD
Silica
Silicates
Silicon
Silicon compounds
Siloxanes
Single crystals
Solvents
spirocyclic
X-rays
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Summary:An intriguing but rare silicon-centered spirocyclic compound, spiro[5.5]octaferrocenylpentasiloxane (4) featuring silicon fused six-membered ferrocenyl-functionalized siloxane rings, has been obtained during the thermally induced transformation of triferrocenylsilane Fc3Si–H (1) into triferrocenylsilanol Fc3Si–OH (2), when N,N-dimethylformamide (DMF) was used as a solvent in the presence of the metal carbonyl Mo(CO)6. The unexpected formation of the maximally ferrocenyl substituted silicon centered spirocyclic 4 involves the obtention, and subsequent condensation, of different ferrocenylsilanol intermediates. Spirocyclic silicate 4 has been characterized using a combination of MALDI-TOF mass spectrometry, elemental analysis, and single crystal X-ray diffraction analysis.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst12081122