Buenzli, J. C.Merbach, A.2006-02-152006-02-152006-02-15197210.1002/hlca.19720550819https://infoscience.epfl.ch/handle/20.500.14299/223515Niobium(V) and tantalum(V) halide addition compounds. VIII. Adducts of niobium(V) chloride with phosphorus oxytrichloride and oxytribromidetext::journal::journal article::research article