You're a bit confused here mate.
Chelating agents are micro organisms (or any other element that does the same thing) that convert composted organic matter into useable nutrient mineral forms for plant intake in soil mediums. Molasses does not include any chelating agents, nor do plant leaves contain any and therefore the plant has no way of converting the organic matter into useable plant nutrients for absorbtion by the leaves in a foliar spray.
What Molasses does include is a high level of carbohydrates and sugars (and small quantities of all trace mineral macro and micro)elements which acts as a 'feed' to the soil micro-herd formed of those micro-organisms, microbes and beneficial fungi that multiply and colonise larger areas of the plant and soil rootzone. This enables a larger colony of these organisms to break down larger quantities of organic matter into plant usuable mineral nutrients in a shorter amount of time. This effectively speeds up the plants intake of those mineral nutrients as they're being broken down faster.
Molasses shouldn't really be used as a foliar feed as it has very little beneficial affect.