The only formylsilane isolated as a stable compound,(Me3Si), SiCH0, reported by Tilley et al. z in 1988, represented an impressive synthetic achievement, being prepared from a mixed cyclopentadienyl acylzirconium precursor. Unlike Me3SiCH0, 3* 4 (Me3Si) 3SiCH0 was found to be thermally stable although it decomposes exothermically in airs2 We wish to report the convenient preparation of formyltriisopropylsilane (2) from a modified dithiane- ...