Magnum Hunter Resources Corp. , Houston, (NYSE: MHR) has received commitment letters from Citigroup Global Markets Inc. , Credit Suisse AG , BMO Capital Markets Corp. , UBS Securities LLC , and Capital One NA for a $450-million senior secured second lien term loan facility to fund the acquisition of North Dakota Williston Basin oil and gas properties from an affiliate of Baytex Energy Corp., pay off an existing $100million term loan facility and to fund anticipated increased capex.