C Minor Eleventh Flat Nine

Symbols:Cm11b9
Scale Degree Formula:1-♭3-5-♭7-♭9-11
Interval Stack:m3 + M3 + m3 + m3 + M3
Notes:C, D#, G, Bb, C#, F
Hear this chord:▸ Guitar

Construction

Using the scale degree formula, we first start with the C major scale, and number each note in the scale starting from 1 - these are the scale degrees. Next, we use the scale degree formula, in this case 1-♭3-5-♭7-♭9-11, to select notes from our enumerated scale. When a chord requires notes that are not in the scale, this is indicated with a flat (♭) or a sharp (#) along with the scale degree; a ♭3, for instance, would be one half-step down from the 3rd scale degree.
Alternatively, we can use the interval stack to construct our chord. With this approach, we first start with the lowest note of the chord (C), then move our first interval (m3), which brings us to our second note in the chord (D#). We repeatedly apply each of the remaining intervals in the stack to get the full list of notes for our chord.
The diagram below shows how both the scale degree formula and interval stack methods result in the same selection of notes:
C1C#♭2D2D#♭3E3F4F#♭5G5G##5A6Bb♭7B7C8C#♭9D9D#♭10E10F11m3M3m3m3M3

Similar Chords

The following chords are similar to this chord and may be a suitable replacement in certain scenarios.

Chord TypeChords
7th Suspended Four Flat 9thC7sus4b9
Dominant 6thD#7(6)
Dominant 9thD#9
Dominant 9th Flat ThirteenthF9b13, D#9b13
Dominant EleventhF11, D#11
Dominant Eleventh Flat NineC11b9
Dominant ThirteenthD#13
Major 9th Flat FifthC#Maj9b5
Major EleventhG#M11
Major ThirteenthG#M13
Minor EleventhFm11, Cm11, Bbm11
Minor Six-NineBbm6/9
Minor ThirteenthBbm13
Six-NineD#6/9

Associated Scales

This chord can be found in the following scales.

ScaleRoots
DorianBb
LocrianG
LydianC#
MajorG#
MinorF
MixolydianD#
PhrygianC

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