An answer to the spiro versus ANSA dilemma in cyclophosphazenes

Castéra, Pierre; Faucher, Jean‐Paul; Labarre, Jean‐François; Perly, Bruno

doi:10.1016/0022-2860(87)80077-7

Cited by 24 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In other words, no genuine mono ansa derivative from NaP3C16 itself had ever been synthetized, the mono ansa derivative of Harris & Williams (1984) being most uncommon. We recently reported a rapid and simple synthesis (a few hours at room temperature) of the first genuine mono ansa derivative from NaP3C16 (Castera, Faucher, Labarre & Perly, 1987), the difunctional reagent being the simplest Lehn's ligand, H2N--(CH2)2--O--(CH2) 2-NH 2. The present paper reports on the X-ray structure of this unique chemical, which incidentally exhibits a very unusual chemical behaviour (Castera, Faucher, Graffeuil & Labarre, 1988).…”

mentioning

confidence: 99%

Structure of the first genuine ansa derivative, N3P3Cl4[HN(CH2)2O(CH2)2NH]

Enjalbert¹,

Galy²,

Castéra³

et al. 1988

Acta Crystallogr C

View full text Add to dashboard Cite

mentioning

confidence: 99%

Structure of the first genuine ansa derivative, N3P3Cl4[HN(CH2)2O(CH2)2NH]

Enjalbert¹,

Galy²,

Castéra³

et al. 1988

Acta Crystallogr C

View full text Add to dashboard Cite

Recent aspects of the structure and reactivity of cyclophosphazenes

Chandrasekhar

Thomas

Structures and Biological Effects

View full text Add to dashboard Cite

This review describes the reactivity and structural aspects of cyclophosphazenes. The reactions of halogenocyclophosphazenes with a variety of monofunctional and difunctional reagents are described. The mechanisms of the reactions involved are discussed in light of kinetic evidence and product analysis. Reactions involving main-group and transition-metal reagents and halogenocyclophosphazenes are also described. The chemistry of hydridophosphazenes containing a P-H bond is described in more detail. Some of the rearrangement reactions including cis-trans isomerism and tautomerism which are common to some cyclophosphazene derivatives have been discussed. The coordination chemistry involving cyclophosphazenes as ligands via endocydic and/or exocyclic coordination sites resulting in several types of derivatives including metallocenyl cyclophosphazenes, metal dusters and carboranyl cyclophosphazenes has been critically evaluated. The structural aspects of cyclophosphazenes have been reviewed with particular emphasis on multinuclear NMR and single crystal X-ray methods. Bond angle-bond length variations in X-ray structures of cyclophosphazenes have been explained based on the theories of bonding prevalent in these molecules.

show abstract