All Jewish marriages were registered by the Jewish Community of Vienna.
Their records are available >from the Jewish Community today. Email them and
ask for the information. You can find them via Google or any other search
engine. You can write in English. Alternatively you can also ask the City of
Vienna archives for same information. They hold copies of all Jewish
records- well pretty nearly all of them. Again find them via Google and
write in English and they will reply in German most likely.