C eleventh chords

C11 chord for piano presented by keyboard diagrams.
Explanation: The C eleventh is a six note chord. Due to practical circumstances and/or dissonance the third (E) is omitted in C11 and/or the chord is played inverted. The chord is often abbreviated as C11.
Theory: The C eleventh chord is constructed by adding a third to a ninth chord.


C11 chord diagram
Notes: C - E - G - Bb - D - F

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C11 inverted

C11 chord diagram
One of many possible inversions

C chord categories

C Cm C7 Cm7 Cmaj7 C6 Cm6 C6/9 C5 C9 Cm9 Cmaj9 C11 C13 Cadd C7-5 C7+5 Csus Cdim Caug