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Are R-134a quick-couple adapters compatible with R-1234yf systems?

In other words, do R-1234yf systems use the same charging port design as R-134a?
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What exactly is R-1234yf?

I keep on reading about a new refrigerant, R-1234yf, that is being adopted by some automotive manufacturers. What is this refrigerant all about, why are manufacturers considering it and what makes it ...