Metal carbonyl chemistry. Part XVIII. Preparation and reactions of some transition metal derivatives of hexafluorobicyclo[2.2.0]hexa-2,5-diene
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 14,p. 1439-1445
- https://doi.org/10.1039/dt9750001439
Abstract
Hexafluorobicyclo[2.2.0]hexa-2,5-diene reacts with [M(Ph3P)4](M = Pt or Pd) to afford air-stable complexes of the type [(C6F6)M(PPh3)2]. These compounds react further with [Pt(Ph3P)4] or [Pd(Ph3P)4] to give the compounds [(C6F6){Pt(PPh3)2}2] and [(C6F6){Pd(PPh3)2}2], respectively; the latter complex is also obtained on thermal decomposition of [(C6F6)Pd(PPh3)2] in solution at 90 °C. The para-bonded benzene also reacts with an excess of acetylacetonatobis(ethylene) rhodium to give [(C2H4)(acac)Rh(C6F6)] and [{(C2H4)(acac)Rh}2(C6F6)]. The mono-rhodium complex reacts with 1,2-bis(diphenylphosphino)ethane to yield a compound which is thought to be [(C6F6)Rh(acac)(Ph2P·CH2·CH2PPh2)]. Reactions of the para-bonded benzene with carbonyl-metal anions to yield the compounds [(C6F5)M(CO)5](M = Mn or Re) and [(C6F5)Fe(CO)2(π-C5H5)] are also described, together with the preparation of the adducts [(RC6F6)Mn(CO)5](R = H, Me, or Ph) obtained by reaction of hexafluorobicyclo[2.2.0]hexa-2,5-diene with [HMn(CO)5], [MeMn(CO)5], or [PhMn(CO)5]. In all complexes described the para-bond is retained.Keywords
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