Electrophilic Additions of Mercury and Gold Species to the Anion Carbide Cluster [Fe5C(CO)14]2-. X-ray Crystal Structures of (NEt4)[Fe5
详细信息 查看全文
- 作者：Roser Reina ; Olga Riba ; Oriol Rossell ; Miquel Seco ; Pilar Gó ; mez-Sal ; Avelino Martí ; n ; Dominique de Montauzon ; and Alain Mari
- 刊名：Organometallics
- 出版年：1998
- 出版时间：September 14, 1998
- 年：1998
- 卷：17
- 期：19
- 页码：4127 - 4135
- 全文大小：143K
- 年卷期：v.17,no.19(September 14, 1998)
- ISSN：1520-6041
文摘
The reaction of the carbide carbon anion [Fe5C(CO)14]2- with ClHgM in tetrahydrofurangives the new heptametallic clusters (NEt4)[Fe5C(CO)14{
mages/entities/mgr.gif">-HgM}] (M = Mo(CO)3Cp (1a),W(CO)3Cp (1b), Mn(CO)5 (1c), Co(CO)4 (1d), Fe(CO)2Cp (1e)). The spiro species (NEt4)2[mages/entities/mgr.gif">4-Hg{Fe5C(CO)14}2] (2) has been isolated by reaction of the pentairon carbide carbon dianionwith Hg(NO3)2. The structures of 1b and 2 have been determined by X-ray diffractionmethods. The anion of 1b has an Fe5 square-pyramidal metal skeleton in which a basaledge is bridged by the HgW(CO)3Cp moiety. For the cluster anion 2, the metal core consistsof a four-coordinate mercury atom bridging the bond edges of two square-based-pyramidalpentairon units. The electrochemical behavior of these compounds has been investigatedby cyclic voltammetry and coulometry. The 57Fe Mössbauer spectroscopy of complexes 1b,ereveals the existence of three and four types of iron sites, respectively. This study has beenextended by reacting the new species (NEt4)[Fe5C(CO)14{mages/entities/mgr.gif">-HgM}] (1a,b) with AuPPh3+ togive the neutral octametallic clusters [Fe5C(CO)14{mages/entities/mgr.gif">-HgM}{mages/entities/mgr.gif">-AuPPh3}] (M = Mo(CO)3Cp(3a), W(CO)3Cp (3b)).