Accession Number : ADA255500


Title :   Electronically Active Cyclocarborane-Metal-Arene Assemblies


Descriptive Note : Final rept. 1 Jun 1989-31 May 1992


Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE


Personal Author(s) : Grimes, Russell N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a255500.pdf


Report Date : 31 Jul 1992


Pagination or Media Count : 8


Abstract : The designed synthesis of stable, soluble macromolecular complexes incorporating MC2B3 subunits (in which M is a transition metal) was explored in detail, with emphasis on (1) the efficient preparation of viable building-block molecules such as Cp*Co(Et2C2B3Hs) (Cp* = Tn5-C5Me5); (2) the derivatization and tailoring of these via attachment of substituents (including organic functional groups) to the carborane rings; (3) the construction of multidecker stacks via a novel metal-promoted stacking process; (4) the linkage of stacked sandwiches via coupling, fusion, and other methods; and (5) initial studies on the preparation of electroactive or magnetoactive solid state materials from metallacarborane precursors. The synthesis of novel metallacarborane sandwiches that are direct structural analogues of metallocenes, and mixed-sandwich salts of the type Cp2M+ (Et2C2Bn)2Mi in Which M and M' are transition metals was also achieved. Detailed studies of the molecular and electronic structures of many of the above systems were conducted via NMR, ESR, X-ray crystallography, and electrochemical methods.


Descriptors :   *CRYSTALLOGRAPHY , *CARBORANES , ELECTRONICS , METALS , TRANSITION METALS , PREPARATION , SYNTHESIS , MOLECULES , MATERIALS , POLYMERS , PRECURSORS , STRUCTURES , SOLIDS , MACROMOLECULES , TRANSITIONS , ATTACHMENT , SALTS , LINKAGES , STACKING , COUPLINGS


Subject Categories : Crystallography


Distribution Statement : APPROVED FOR PUBLIC RELEASE