An example of a diminished 5th chord

Historic de un Amor - Almaran sung by Luz Casal
https://m.youtube.com/watch?v=PS2DJxXTow8#fauxfullscreen


For example on the song above.
The chord comes from bass code D7, when the scale or key is C minor. So generalizing such chord may appear if we take any minor scale, and use the second ascending note of the scale with the basic rule 1 3 5 7 above bass.


So it is:


D bass and D F bA C


It can be heard throughout the beginning of verse and chorus of the masterpiece song written by
Panamanian songwriter Carlos Eleta Almaran.


Such chord can also be heard as the second chord of
Concerto 40 in G minor - Mozart
A bass and A C bE G
But Mozart does the trick of keeping bass G, pedal bass, so it is:
G bass and A C


See also:


Bach bass rules - Bach, Niedt


Harmony - Piston