[Furanone]

I just saw this:

http://www.greencarcongress.com/2015/01/20150130-grubbs.html

This is not my area specifically, so I wanted to ask some organic chemists -- with turnover rates as stated at such low catalyst concentration (1-3 ppm), would this be considered a substantial move forward from the more currently used Rhenium(VII) oxide catalyst in creating higher value α-olefin products for use in lubricants, thermoplastics, and pharmaceuticals from renewable plant fatty acids?

[curiouscat]

Naive question: Are they talking of a homogeneous catalyst or heterogeneous?

The ppm description makes me think homogeneous. But just making sure.

Also, what about T, P conditions. The commentary is light on that. Side products? Often activity might be good but selectivity not so great. Though given that the goal is alpha olefins that may not matter as much.

Also, how hard / expensive is the synthesis step for their new catalyst.