Reactions of aminated cyclotri- and cyclotetra-phosphazenes, viz., N3P3L6 and N4P4L8 (L = -NC4H8O, -NC5H10, -HNC6H11 and -HNC8H17) with W(CO)6 have been studied. [(N3P3L6)W(CO)3] derivatives are obtained with N3P3L6 while N4P4L8 yield tetracarbonyl substituted derivatives, [(N4P4L8)W(CO)4]. Mixed ligand tungsten tricarbonyls of the type [C12H8N2)(N3P3L6 or N4P4L8)W(CO)3] have also been synthesized with [(o-phen)W(CO)4].