Measurement of an exceedingly long metal carbonyl C–O bond by single crystal X-ray diffraction in Ru8(µ-H)2(µ6-η2-CO)(CO)19(η6-C16H16)

Abstract

The [2.2]paracyclophane octaruthenium cluster, Ru₈(µ-H)₂(µ₆-η²-CO)(CO)₁₉(η⁶-C₁₆H₁₆)1, is isolated from the thermal reaction between Ru₃(CO)₁₂ and [2.2]paracyclophane in n-heptane; a single crystal X-ray structure analysis reveals that one of the carbon monoxide groups bonds to six of the Ru atoms via a µ₆-η² interaction resulting in possibly the longest metal–carbonyl C–O bond recorded thus far.