AbstractAnilin und Diphenylamin werden an dem substituierten Teil des Diens in (IIa) unter Bildung der Dienylaminkomplexe (I) mit syn‐syn‐Geometrie addiert.

AbstractDas 3‐6‐17‐Cycloheptatrien‐Fe‐ carbonyl (I) bildet in flüssigem SO2 reversibel das 1:1‐Addukt (II).

Aniline and diphenylamine add to the substituted end of the diene in tricarbonyl(2–6-η-hexadienium)iron to give dienylamine complexes having syn geometry. Tertiary amines, PPh3, and AsPh3 add to the unsubstituted end to give quaternary adducts having anti geometry. The tertiary amine adducts undergo elimination when heated in vacuo to give the syn-hexatriene complex in good yield. Tricarbonyl(2–6-η-heptadienium)iron is converted directly into the syn-heptatriene complex on treatment with tertiary amines, but forms anti adducts with PPh3. Hydrogen-2 labelled syn-[Fe(hexatriene)(CO)3] protonates at its unto-ordinated double bond.

Tricarbonyl(3–6-η-cycloheptatriene)iron, (1), forms a reversible 1 : 1 adduct with sulphur dioxide. The adductand other tricarbonyliron complexes with the σ, η3 mode of bonding exhibit small Mössbauer quadrupole splittings. Tetracyanoethylene undergoes 1,3-addition to the unco-ordinated side of the ring of both the 1- and 2-acetyl derivatives of (1), whereas the proton adds to the co-ordinated double bond of the 2-acetyl derivative.

AbstractTricarbonylhexa‐l ,3‐dieneisen (I) addiert tertiäre Amine zu den Addukten (IIa), die beim Erhitzen unter Eliminierung nahezu quantitativ die Trienkomplexe (III) ergeben.

Addition of some cationic tricarbonyliron complexes to tricarbonylcycloheptatrieneiron can lead to polymerization.

Treatment of dienium complexes of tricarbonyliron with tertiary amines leads to either addition or proton abstraction depending upon the substitution pattern.

AbstractAcylierung von (I) und nachfolgende Reduktion mit Natriumborhydrid (II) liefern die Alkohole (III), aus denen durch Dehydroxylierung mit Tetra= fluorborsäure (IV) die Salze (V) in hohen Ausbeuten zugänglich sind.