188575-42-0

Basic information

• Product Name: [PPh₄][Ta(2,2'-(hydroxyimino)diacetate)2)]
• CAS NO: 188575-42-0
• Molecular Weight: 812.503
• Mol File: 188575-42-0.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: [PPh₄][Ta(2,2'-(hydroxyimino)diacetate)2)](CAS DataBase Reference)
• NIST Chemistry Reference: [PPh₄][Ta(2,2'-(hydroxyimino)diacetate)2)](188575-42-0)
• EPA Substance Registry System: [PPh₄][Ta(2,2'-(hydroxyimino)diacetate)2)](188575-42-0)

Safety Data

• Hazardous Substances Data: 188575-42-0(Hazardous Substances Data)

Upstream product

• 2751-90-8 tetraphenylphosphonium bromide 
• 87339-38-6 N-hydroxy-imino-diacetic acid 
• 150747-55-0 tantalum pentaethoxide 

Relevant articles and documents

Synthesis and structures of niobium(V) and tantalum(V) analogues of Amavadin: [M(hida)2]- (M = NbV or TaV, H3hida = hydroxyiminodiacetic acid) and [Nb(R,R-hidpa)2]- [H3hidpa = 2,2′-(hydroxyimino)-dipropionic acid]

Reactions of M(OEt)5 (M = Nb or Ta) with N-hydroxyiminodiacetic acid (H3hida) yielded the complexes [M(hida)2]- (M = Nb 1 or Ta 2). Single-crystal X-ray diffraction revealed the same novel eight-co-ordinated structure identified for Amavadin, the form in which vanadium(IV) is bound in Amanita muscaria mushrooms. This type of structure gives rise to chirality at the metal, where 1 and 2 consist of an equimolar mixture of the Δ and Λ helical forms in the crystal lattice. The complexes [Nb(R,R-hidpa)2]- 3a and [Nb(R,S-hidpa)2]- 3b [H3hidpa = 2,2′-(hydroxyimino)dipropionic acid] were synthesized via the route used for 1 and 2, and X-ray crystallography confirmed the presence of the same Amavadin-style geometry. Cyclic voltammetry in CH2Cl2 showed that at 254 K 1 and 3a exhibit quasi-reversible reductions at E1/2 = -1.22 and -1.35 V (vs. saturated calomel electrode), respectively, whereas 2 displays an irreversible reduction (-1.92 V).