#iv°7–V in F♯ Major

Pattern: #iv°7 – V Chords: Cdim7 – C♯

Chord Breakdown

Numeral	Chord	Type	Function
#iv°7	Cdim7 (details)	diminished seventh	Subdominant
V	C♯ (details)	major	Dominant

Harmonic Analysis

This progression moves through Cdim7 (Subdominant) → C♯ (Dominant).

The #iv°7–V progression uses a chromatic diminished seventh chord to approach the dominant from below. The #iv°7 chord is enharmonically equivalent to a rootless V7(b9), creating an intense chromatic pull toward the dominant. This common-tone diminished chord resolves smoothly because three of its four notes move by half step to chord tones of V. It is a favorite device in barbershop, jazz, and romantic-era classical music.

Song Examples

Georgia on My Mind — Ray Charles
Heart and Soul — Hoagy Carmichael
Have Yourself a Merry Little Christmas — traditional

Chord Details

Cdim7 C♯

More Progressions in F♯ Major

I–IV–V–I I–V–vi–IV I–vi–IV–V ii–V–I I–IV–V I–♭VII–IV vi–IV–I–V I–V–vi–iii–IV–I–IV–V I–IV I–V IV–V IV–I

Related Progressions

viidim7–I V7–I viidim–I