Applications of pulsed field gradient spin-echo measurements to the determination of molecular diffusion (and thus size) in organometallic chemistry

Pulsed field gradient spin-echo (PGSE) measurements on (a) four arsine comp lexes of Pd(II), PdCl2L2 (L = AsMexPh3-x (x 3-0)), (b) three different ferr ocene phosphine dendrimers, and (c) a selection of other organometallic com plexes of differing molecular weight, are demonstrated to provide a practic al alternative to classical methods used in organometallic chemistry for es timating molecular size. PGSE measurements make use of translational and no t rotational properties of molecules and will be especially valuable where one cannot isolate an unknown complex and/or where a side product is of esp ecial interest, since one can measure several components of the mixture sim ultaneously.