Lanthanoiden‐Komplexe, I Solvensfreie Alkoxid‐Komplexe des Neodyms und Dysprosiums. Kristall‐ und Molekülstruktur von trans‐Bis(acetonitril)tris(tri‐tert‐butylmethoxy)neodym

Complexes of the Lanthanides, I. – Solvent‐Free Alkoxide Complexes of Neodymium and Dysprosium. Crystal and Molecular Structure of trans ‐Bis(acetonitrile)tris(tri‐ tert ‐butylmethoxy)neodymium The first lanthanide complex 3a is obtained from the sterically demanding silanol ( t C 4 H 9 ) 3 SiOH (, „silox”︁, 1a ) and Nd‐[N{Si(CH 3 ) 3 } 2 ] 3 ( 2a ). Similarly, the bulky alcohols, „tritox‐H”︁, tri‐ tert ‐butylmethanol ( 1b ), and, „ditox‐H”︁, di‐ tert ‐butylmethanol ( 1c ), react with 2a to give the corresponding alkoxide complexes Nd(tritox) 3 ( 3b ) and [Nd(ditox) 3 ] 2 ( 3c ), respectively. Under the same conditions Dy[N{Si(CH 3 ) 3 } 2 ] 3 ( 2b ) yields the homoleptic ditox derivative 6 . The new complexes are all very soluble in aliphatic hydrocarbons. They show a very different thermal stability as, for example, expressed in their sublimation behaviour.