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Binuclear silver (I) complexes of double armed diaza-crown ethers, 7,16-bis(2′-thiazoyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane and 7,13-bis(2′-thiazoyl)-1,4,10-trioxa-7,13-diazacyclopentadecane were prepared. In these complexes, two Ag+ cations were cooperatively coordinated by thiazole-functionalized side arm and parent diaza-crown ring, and their Ag···Ag′ separations (2.790 and 2.969 A) were either shorter (≈0.1 A) or slightly longer (≈0.08 A) than the intermetallic distance (2.889 A), respectively.

Consecutive SNAr-dealkylation reactions of heteroaromatic chlorides such as 2-chloro-5-trifluoromethylpyridine and 2-chlorobenzothiazole with tertiary amines took place under high pressure in a highly selective fashion; some synthetic potential of the title reaction was exemplified.

The cheletropic reaction of dichlorophosphines to tricyclo[5.3.1.04,9]undeca-2,5-diene, followed by hydrolysis with water gave 6-substituted-6-oxo-6-phosphapentacyclo[6.3.1.02,4.03,7.05,10]dodecanes whose structures were established by an X-ray crystallography.

Title compounds, whose polarization is decreased by antiaromaticity of cyclopentadienone, have been synthesized through a novel Rh(II)-catalyzed arylation of cyclic 2-diazo-1,3-diones.