Decalin was converted in a flow-type reactor under a hydrogen pressure of 5.2 MPa on Ir/H, A-Beta zeolite catalysts, where A stands for an alkali metal cation. In one series of catalysts, the Ir content was 3wt.%, and the nature of A was varied from lithium to cesium. In a second series, the iridium content in Ir/H, Cs-Beta was varied from 1 to 5wt.%. On some of these catalysts, open-chain decanes (OCDs) were formed with unprecedented selectivities and ...