 The leading-tone seventh chords are vii7 and vii7 , the half-diminished and diminished seventh chords on the seventh scale degree () of the major and harmonic minor.For example, in C major and C minor, the leading-tone seventh chords are B half-diminished (BDFA) and B diminished (B()DFA), respectively.Leading-tone seventh chords were not characteristic of Renaissance music but are typical of the Baroque and Classical period.