Coordination ambivalence and fluxional behavior in mono- and binuclear pentacarbonyltungsten complexes of pteridine and its deaza derivatives. Journal of Organometallic Chemistry, (369)1:83--103, 1989. [PUMA: carbonyl complex;triazanaphthalene complex;tungsten deaza deriv deriv;naphthyridine fluxionality pteridine tungsten]