Synthesis of indenyl-ruthenium(II) σ-alkynyl complexes via nucleophilic addition of (1R)-(+)- and (1S)-(−)-camphor enolates on the allenylidene group of [Ru(CCCPh2)(η5-C9H7)(PPh3)2][PF6]: Efficient synthesis of novel optically pure vinylidene derivatives | Publicación