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SummaryDiarylsilverlithium compounds of the type ArzAgLi are formed by treating arylsilver compounds with the corresponding aryllithium compounds. Cryoscopy in benzene shows that the Ar,AgLi compounds are associated into dimers. NMR spectroscopic data indicate that only one type of aryl group is present in these dimers, and that each aryl group is bridging between one silver and one lithium atom.

Distamycin A/DAPI staining and sequential C-banding of human lymphocyte chromosomes reveals the regular occurrence of differentially staining subfractions of chromosome 9 constitutive heterochromatin. These subfractions are regionally organized as two subsegments: a distal one, which fluoresces brightly with DAPI after preincubation with distamycin A and a proximal one, which stains intensely with Giemsa after sequential C-banding. Observations are presented that indicate an occasionally independent genetic behavior of these heterochromatin subfractions.

Preliminary Communication3 4 F o r m a t i o n o f ( T I -m e t h a l l y l ) a n d ( r ) -b u t a d i e n e ) l i g a n d s f r o m ( r ) -2 -b u t e n -1 -y l ) c o o r d i n a t e d t o g r o u p I V B m e t Abstract. The synthesis and some p r o p e r t i e s of t h e novel t r i a l l y l compounds CP*M(CH~CH=CHCH~)~ (Cp*=n5-C (CH ) Cp*M(n -butadiene)(r) -metha1 l y l ) therefrom a r e reported. The compounds a r e very r e a c t i v e towards carbon monoxide and o t h e r small molecules.

Arylsilberverbindungen (I) reagieren mit Aryllithiumverbindungen (II) zu Diarylsilberlithiumverbindungen (III).

Die Reaktion der Chloride (I) mit der Grignard‐ Verbindung (II) bei tiefen Temp. lieferte die o‐Allylkomplexe (III), von denen nur (IIIa) in reiner Form isoliert werden konnte.