Znorg. Chem. 1988, 27, 3137-3140 A summary of hydrogen-bonded contacts observed in M-
(allo),S04.4H20 complexes is given in Table VIII.
Acknowledgment. We thank Professor H. R. Oswald for standing support of this Project. Research grants from the swiss National Science Foundation (No. 2.838-085) are gratefully acknowledged.
3137
Registry No. C0~~(allo),S0~.4H~O, 115512-16-8; Ni"(al10)~SO~4 H 2 0 , 115312-17-9; Zn11(allo)2S04-4H20,115512-18-0; Cd"(allo)SOa.4H,O, 115512-19-1. Supplementary Material Available: Tables of anisotropic thermal parameters and of bonding distances and angles involving H atoms (3 pages); listings of observed and calculated structure factors (74 pages). Ordering information is given on any current masthead page.
Contribution from Immunopharmaceuticals R&D, NTR, Medical Products Department,
E. I. du Pont de Nemours & Company, Inc., 331 Treble Cove Road, North Billerica, Massachusetts 01862
Technetium Metallothioneins M. M. Morelock,* T. A. Cormier, and G. L. Tolman Received January 28, 1988 Transchelation of % T'c from TcO(GH)~(GH = glucoheptonate) for Zn2+in metallothionein (MT) was evaluated as a function of MT concentration, pH, buffer, and reaction time. Incorporation of >90% of the 99mTcpresented was achieved in
