Synthesis and reactions of chiral clusters containing an SRuCoMo core

In order to resolve tetrahedron-type chiral clusters, three chiral clusters containing a functionally substituted cyclopentadienyl ligand were prepare d, and the reactions of functional substituents were investigated. The este r group was hard to hydrolyze while hydrazide can easily condense with the ketonic carbonyl on the cyclopenta- dienyl ring to form a cluster hydrazone . Two optically active auxiliaries have been attached to the chiral framewo rk; however, the diastereoisomers cannot be separated by silica gel chromat ography. Their presence was established by C-13 NMR spectra.