Metallorganische Synthesen mit freien Cyclopentadienyl-Radikalen, I. Zweikernige Carbonylnickel-Komplexe mit mehrfach alkylierten Cyclopentadienyl-Liganden / Metalorganic Syntheses with Free Cyclopentadienyl Radicals, I. Dinuclear Carbonyl Nickel Complexes with Alkylated Cyclopentadienyl Ligands (original) (raw)

FB C h em ie der U niversität, Erw in-Schrödinger-Straße. D-67663 K aiserslautern Z. N aturforsch. 50b, 7 5 0-7 5 6 (1995); ein gegan gen am 11. A ugust 1994 C yclopentadienyl N ickel C om p lexes, Crystal Structure C yclopentadienyl nickel co m p lex es [(C 5 H 2 rBu3-l,2,4)N i(M-C O) ] 2 (1) and [(C 5 H /Pr4)N i(//-C O) ] 2 (2) have been syn th esized from nickel tetracarbonyl and the corre sp ond in g lithium cyclopentad ienide, and [(C 5 /Pr5)N i(//-C O) ] 2 (3) has b een ob tain ed in high yield from nickel tetracarbonyl and the free pen taisop rop ylcyclop en tad ien yl radical. The crystal structure o f 1 sh ow s a com p lex on a crystallographic mirror plane w ith a bent N i-C-N i-C core w hereas the crystal structure o f 2 exhibits tw o in d ep en d en t planar m o le cules possessin g crystallographic inversion sym m etry. * Son derdruckanforderungen an Priv.-D oz. Dr. H. Sitz mann.