Syntheses and Formation Mechanisms

3 Syntheses and Formation Mechanisms Syntheses of Organotin Oxo-Clusters 

A comment needs to be made on the yields of reactions. Indeed, hydrolysis-condensation reactions can yield well-defined organotin oxo-clusters, but they can also yield ill-defined organotin oxo-polymers. 

air moisture, few weeks DMPU, air moisture, few weeks DMSO, (NH4)2Mo04 (1.25 eq.), air moisture, few days 

Because, in (RSn)i20i4(OH)6 X2, the anions do not interact directly with any tin atom but with the /U-2-OH that constitute the charged poles, the exchange of the anions or their ionic dissociation cause only small changes on the Sn chemical shifts (Table 2.3.1). H- H NOESY/ROESY (homonuclear Overhauser correlation spectroscopy) and HOESY (heteronuclear NOESY) have been used to 

There is another type of reaction with (RSn)i20i4(0H)6 X2 that preserves its structure. Even though no species were isolated, the possible replacement of two /U2-OH, out of six, by methanol has been clearly shown by electrospray mass spectrometry (ES-MS).  

---