# Term used to describe scalar coupling over a single bond?

I know that coupling on NMR over two bonds is referred to as geminal coupling and over three bonds is referred to as vicinal coupling. However is there a term for coupling over one bond (such as a carbon-13 bonded to a fluorine?

• As far as I know it's usually called "one-bond coupling". Like DSVA I've never heard of any other special term. For example: u-of-o-nmr-facility.blogspot.co.uk/2009/01/… – orthocresol Jan 22 '17 at 14:40
• FWIW: geminal and vicinal are generic chemistry terms and not unique to NMR at all. The technically correct way to describe coupling is to use the J descriptor; but common expressions include directly bonded and especially one-bond coupling – long Jan 23 '17 at 0:36

I've never heard a special term but you can describe it as $^1 J$ or $^1 J_{CF}$ coupling using the systematic nomenclature.