Hexatonic Scales
D° over C° (diminished triad over diminished triad a whole step apart).
C        E♭       G♭    A♭                D        F
1        ♭3       ♭5    ♭6                9        11

Parent scales are Eb melodic minor (no 5) or C diminished (no 6 and 7).
Eb    F  G♭    A♭          C     D  
1     2  ♭3    4           6     7

Related chords
| Cm7♭5 | F13♭9 | A♭7 | D7 || C°7 | E♭°7 | F13♭9 | F♯°7 | A♭7 | A°7 | B7 |
Am shape
A♭ G♭ F E♭ D C A♭ G♭ F E♭ D C A♭ G♭
Gm shape
C A♭ G♭ F E♭ D C A♭ G♭ F E♭ D C A♭
Em shape
E♭ D C A♭ G♭ F E♭ D C A♭ G♭ F E♭ D C
Dm shape
F E♭ D C A♭ G♭ F E♭ D C A♭ G♭ F E♭ D
Cm shape
G♭ F E♭ D C A♭ G♭ F E♭ D C A♭ G♭ F
2 nps
G♭ F E♭ D B♭ A♭ G♭ F E♭ D B♭ A♭
2 nps
A♭ G♭ F E♭ D B♭ A♭ G♭ F E♭ D B♭
2 nps
B♭ A♭ G♭ F E♭ D B♭ A♭ G♭ F E♭ D
2 nps
D B♭ A♭ G♭ F E♭ D B♭ A♭ G♭ F E♭
2 nps
E♭ D B♭ A♭ G♭ F E♭ D B♭ A♭ G♭ F
2 nps
F E♭ D B♭ A♭ G♭ F E♭ D B♭ A♭ G♭
3 nps
E♭ D C A♭ G♭ F E♭ D C A♭ G♭ F E♭ D C A♭ G♭ F
3 nps
A♭ G♭ F E♭ D C A♭ G♭ F E♭ D C A♭ G♭ F E♭ D C