Lanthanides and actinides. Annual survey covering the year 1992 ti

This review has been restricted to compounds of the lanthanides and actinides containing M-C bonds as defined by Section 29 of Chemical Abstracts. The prelanthanides SC, Y and La have been included because of their similar size and charge to the lanthanides. Abstracts of papers presented at conferences, dissertations and patents have mostly been excluded. Several general review articles on f-element organometallic compounds appeared in 1992. Ephritikhine [l] published a survey of organoactinide chemistry, focusing on work done since 1985 (184 references). Complexes with cyclopentadienyl and other dienyls (pentadienyl, cyclohexadienyl, indenyl, phospholyl), cyclooctatetraenyl and arene ligands, hydrocarbyls and hydrides and the structures and stability of some organoactinides were the subject of this review. Two annual surveys were published by R.D. Rogers and L.M. Rogers covering the years 1987-1989 (370 references) [ 23 and 1990 (102 references) [ 31. These reviews have been restricted to compounds of the lanthanides and actinides containing M-C bonds. A few more specialized review articles also appeared in 1992. Fryzuk [4] reported on ligand design in inorganic chemistry. In this article an overview is given of the strategy used to design the tridentate ligand -N(SiMe,CH,PR,),, which is suitable for coordination to both late and early transition metals. Extension of this chemistry to Group 3 (Y, La) elements and the lanthanides (Ce, Sm, Eu, Er, Yb, Lu) is also discussed (total of 38 references). Evans et al. [ 51 published a study of the reactivity of hydrazines with organometallic samarium complexes (46 references). This study shows that there is sufficient space in the coordination environment generated by two (C,Me,),Sm units to derivatize substrates inside the cavity formed by four C,Me, rings. Giardello et al. [6] reviewed organo-f-element thermochemistry. This