Showing papers by "John F. Nixon published in 1990"
TL;DR: The modes of ligation of the two five-membered rings in [Mo(η5-C5Me5)(η3-P2C3But3)(CO)2] and [Mo[η 3-C9H7] showed interesting differences.
Abstract: The modes of ligation of the two five-membered rings in [Mo(η5-C5Me5)(η3-P2C3But3)(CO)2] and [Mo(η3-C9H7)(η5-P2C3But3)(CO)2] show interesting differences.
14 citations
TL;DR: Protonation of a 1 : 1 mixture of the anions (P2C3But3) 1 and (P3C2But2) 2, affords the corresponding di- and tri-phosphacyclopentadienes 3 and 4 which undergo a [4 + 2] cycloaddition reaction to form P5C5But5H25 whose structure has been elucidated by NMR spectroscopy and a single crystal X-ray study of its EtOH adduct.
Abstract: Protonation of a 1 : 1 mixture of the anions (P2C3But3)–, 1 and (P3C2But2)–, 2, affords the corresponding di- and tri-phosphacyclopentadienes 3 and 4 which undergo a [4 + 2] cycloaddition reaction to form P5C5But5H25 whose structure has been elucidated by NMR spectroscopy and a single crystal X-ray study of its EtOH adduct P5C5But5H3(OEt), 6; in the [4 + 2] cycloaddition reaction the diphosphacyclopentadiene acts as the diene and the triphosphacyclopentadiene as the dieneophile, unlike the corresponding self-cycloaddition reaction of the triphosphacyclopentadiene there is no subsequent [2 + 2] cycloaddition of the CC and PC bonds in 5 to give a cage structure
13 citations
TL;DR: The two tetrametallic complexes [Pt2Cr2(η5-C5H5)2(CO)6(PEt3)2] and Pt2W2( η5 P3C2But2)2 (CO) 6 (PEt 3) 2] have completely different molecular structures as mentioned in this paper.
Abstract: The two tetrametallic complexes [Pt2Cr2(η5-C5H5)2(CO)6(PEt3)2] and [Pt2W2(η5-P3C2But2)2(CO)6(PEt3)2] have completely different molecular structures.
7 citations
TL;DR: Similarities between phosphorus and carbon in un-saturated systems and their transition metal complexes are discussed in this paper, where the same authors also discuss the relationship between carbon and phosphorus.
Abstract: Similarities between phosphorus and carbon in un-saturated systems and their transition metal complexes are presented and discussed.
4 citations
TL;DR: In this article, different types of ligating behavior of the RP(NR′)PCR′ ring system are reported; the sp2 hybridised phosphorus is the donor atom in Pt(0), W(0) and Rh(I) complexes, whereas ligation of the sp3 hybridized phosphorus atom is preferred by Pd(II), and both phosphorus atoms are ligated in dinuclear Pt(II) systems.
2 citations
TL;DR: In this paper, it was shown that the 2,5-di-t -butyl-1,3,4-triphosphacyclopentadienyl (1) and 2,4,5 -tri-t-butyl -1, 3, 4-diphosphacy clopentadiyl (2, 4, 5)-anion formed in the absence of [Ta(OAr) 2 Cl 3 ] (Ar = 4-Me,2,6- t -Bu 2 C 6 H 2 ), which proves that
Abstract: The reaction of Bu t CP with Na/Hg in monoglyme results in the formation of the 2,5-di- t -butyl-1,3,4-triphosphacyclopentadienyl ( 1 ) and 2,4,5-tri- t -butyl-1,3-diphosphacyclopentadienyl ( 2 ) anions. The reaction has been carried out in the absence of [Ta(OAr) 2 Cl 3 ] (Ar = 4-Me,2,6- t -Bu 2 C 6 H 2 ), which proves that the formation of 1 and 2 does not involve the phosphide intermediate [TaP(OAr) 2 ] previously postulated by Cowley and Hall ( Polyhedron 1989, 8 , 849).
TL;DR: Similarities between phosphorus and carbon in un-saturated systems and their transition metal complexes are discussed in this paper, where the same authors also discuss the relationship between carbon and phosphorus.
Abstract: Similarities between phosphorus and carbon in un-saturated systems and their transition metal complexes are presented and discussed.