Borohydride Complexes of Europium(II) and Ytterbium(II) and Their Conversion toMetal Borides. Structures of (L)4YbBH42 (L = CH3CN, C5H5N)

摘要

Borohydride complexes of numerous metal ions are known. We have found thatacetonitrile and pyridine are exceptionally good ligands for lathanide(II) ions. They promote formation of complexes with boron hydride and carborane anions. Use of these amines allows isolation of complexes that would otherwise be insoluble or unstable in other solvents. When these amines are employed as solvents, stable lanthanide(II) borohydride complexes can be isolated.