Our method'for interrupting the Wurtz synthesis at the mono-and disodium intermediate stages affords opportunity to observe the different ways in which these reagents can react. The normal reaction of amylsodium with an alkyl halide yielding an amylalkyl can of course be predicted. We shall in this paper report our observations (1) that the amyl radical (or ion) 2 in amylsodium can be caused to dimerize to decane when the organometallic ...