# is Secondary chord (triad, seventh) can overlapping Fifth when is not substitute chord?

i giving the situation. image is a resolution of V34

left case of the image is

'D-F' in V going to 'E-E' in I as contrary motion. and from that position, a 'harmonic connection' (any notes shared between two chords should remain in the same voice, and the rest of the voices move the shortest distance possible while avoiding breaking any other rules.) with the ii6's F-D is possible.

but right case of the image is

can't harmonic connection if 'D-F' in V going to 'E-E' in I as contrary motion. so F is going to up.

However, my curiosity here is that if V's 'D-F' goes to the I's 'E-E as contrary motion , can the following progress be made.

E-G-E-C -> D-A-F-A

I think that progression is can be harmonic connection. but as far as I know Secondary chord is can't overlapping Fifth. because 5 in the secondary chord is 3 in the primary chord.

but if is not substitute chord? can overlapping Fifth and Is it possible to proceed as above?

• I'm having a difficult time understanding your question. Are you able to notate the progression you're asking about and post the image? Aug 3 at 4:51
• @aaron i don't have image just an example I made by transforming the on the right side of the image in the main text. D-G-F-B(V) -> E-G-E-C(I) -> D-A-F-A(ii) Aug 3 at 5:54
• I see. So you're wondering if the progression in your comment breaks any rules of harmony or voice leading? Aug 3 at 6:10
• @aaron yeah, for Exactly, is that situation, can overlapping Fifth if is not substitute chord? that's my question. Aug 3 at 6:18
• @aaron I thought you were going to answer my questions soon. Aug 4 at 6:29