Reaction catalyzed by medium-chain acyl-CoA dehydrogenase (1.3.8.7)

		+			=			+		reduced ferrocenium hexafluorophosphate
	hexanoyl-CoA	+		ferrocenium hexafluorophosphate	=		trans-hex-2-enoyl-CoA	+		reduced ferrocenium hexafluorophosphate