it looks like a good Transition state since the iFreq is big.
check if you have ignored the complexation.
for example: A + B = C reaaction, X is the transition state
it is possible that E(X) < E(A) + E(B), because A and B and form weakly bonding complex A - - B, which lower the energy of the system. This gives E(X) > E(A - - B), and X is the valid transition state.
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