I'm confused about secondary dominant chords


For example:
On a C Superlocrian scale what does it mean a “secondary dominant” V/ii Gmaj chord?
Isn’t the root of a C Superlocrian ii a Dd which has an Ab as V?

Thank you,


Hi Roberto,

A secondary dominant is a chord that has been transformed to become a major chord. The 5th chord (or V/I) of C Superlocrian is Gb Major, V/ii is GM, V/iii is AM, etc.

You can read more information about it over here: