I n s t i t u t e of O r g a n i c C h e m i s t r y , U n i v e r s i t y o f Mainz I FRG * ) W a t e r s o l u b l e P o l y m e r s i n M e d i c i n e H u b e r t B a d e r , Helmut R i n g s d o r f , B r i g i t t a S c h m i d t SUMMARY: * ) E x t e n d e d a b s t r a c t o f a p a p e r p r e s e n t e d a t t h e m e e t i n g o f t h e GDCh-Fachgruppe "Makrornolekulare Chemie" o n '!Polymers a n d
LiGe, the G e partial structure consists of a three-dimensional network of tricoordinated germanium atoms. However, the electric conductivity now shows metallic behavior. In LiSn and LiPb, no tricoordinated arrangement of the Sn and Pb atoms, respectively, is found. The Sn atoms still have four Sn neighbors in LiSn; the Pb atoms in LiPb have even six Pb neighbors. In this case, metallic phases are present.
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