Addition of anhydrous SnCl2 to a solution of the unusually reactive Cluster (I) yields the novel Os3Sn Cluster (II) with a near-planar butterfly structure.

Reaction of 2,5-diformylfuran with 3-oxapentane-1,5-diamine in the presence of the perchlorate salts of Ca, Sr, or Ba leads to the isolation of the macrocyclic complexes (I) or (II) (detailed structures unknown) depending on the metal ion and the choice of solvent (MeCN or EtOH).

The catalytic reduction of NO3- to NH3 with the title electrode is accomplished for the first time by the controlled-potential electrolysis at - 1.25 V vs. SCE in water.

Die teilweise bereits früher aus Truxillsäuredichlorid (I) und den Dialkylaminoalkylaminen (II) dargestellten Truxillsäurederivate (III) werden mit Ethyliodid zu den Salzen (IV) quaterniert.

UV and 1H NMR analysis shows that 3′-eliminations from the Cephalosporins (I) are not concerted with nucleophilic β-lactam C-N bond cleavage.

Indenes of type (V) can be prepared by passing a 2-propanone such as (I) over alumina at temp. of about 400°C. Of the likely intermediates (II)-(IV), compounds (II) and (IV) can be identified as constituents of the product mixture.

Acetylacetone (I) reacts with potassium in tert-butanol yielding the alkali salt (II), which is alkylated at C3 to give (IV), whereas the dialkali salt (V) favours C1 alkylation yielding (VI).

Reactions of the hexamer (II) of tetrafluoroethylene with various nucleophiles, yielding the products summarized in the reaction scheme, are studied.

Ausgehend von dem Lacton (Ia) wird über das Triflat (Ib) durch nucleophile Substitution die Fluorverbindung (II) dargestellt.