C#m7b5 Guitar Chord
A key chord of minor jazz. Occurs naturally as the ii chord in minor keys (in ii–V–i progressions). Less tense than the fully diminished seventh chord.
Strings
X–4–2–0–0–0
Other names for the C#m7b5 chord
Other names: C# minor 7th flat 5, C# half-diminished, C#ø7, C#m7♭5
Music theory name: half-diminished seventh chord
Common name: C# half-diminished chord
Notes and intervals in the C#m7b5 chord
| Note | Interval |
|---|---|
| C# | Root |
| E | Minor 3rd |
| G | Diminished 5th |
| B | Minor 7th |
All variations
Fret 4
X–4–5–4–5–X
Fret 5
X–X–5–6–5–7
Fret 8
9–X–9–9–8–X
Fret 11
X–X–11–12–12–12
Open
X–4–2–0–0–0