Acene derivatives, soluble

The compound [Al(Salen)(H20)2]Cl is not air-sensitive. It has mp 162-165°C dec. The cation is soluble only in water. IR (KBr) 3057 s (br) 1639 s, 1560 m, 1473 s, 1296 s, 814 m, 760 s cm . The synthesis and properties of the SalenCl and Acen derivatives are described in Ref. 7. Salophen, Salen( Bu), Salpen( Bu), Salben( Bu), Salophen Bu, and Salomphen Bu derivatives can also be prepared in a similar manner. In the solid state these compounds have been shown by X-ray crystallography to contain six-coordinate octahedral aluminum. The solvent molecules are trans to one another and the hgand copla-nar with the aluminum atom. The chloride anions are connected by hydrogen bonds to the solvents on the aluminum as well as additional solvent in the crystal lattice. 

In addition to work on polymers, there have been several recent results on soluble oligomer semiconductors. In particular, there has been work on various oligothiophene and acene derivatives. The main potential advantage of oligomers is that they tend to form... 

There has been little work on the functionalization of higher acenes, owing to the poor stability and very low solubility of the non-benzannelated derivatives. A poorly refined crystal structure of unsubstituted hexacene has been reported (without atomic coordinates), implying that it too arranges in a herringbone motif analogous to the lower acenes [87]. 

Using suitably substituted acetylenes as starting materials, super naphthalene and super triphe-nylene have been synthesized [45], The unsubstituted super acenes are insoluble solids. In order to obtain soluble derivatives, f-butyl groups were added to the periphery of the super acenes. Synthesis of super triphenylene is illustrated in Scheme 16.41 [45]. 

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