Gert Heckmann

[(C5Me4R)Co(As2)]-Molekülbausteine

Abstract The co-thermolysis of [(η5-C5Me4R)Co(CO)2] (1a: R  Me, 1b: R  Et) with yellow arsenic, As4, affords the binuclear and trinuclear complexes [(η5-C5Me4R)CO(As2)]2 (2a, 2b), [(η5-C5Me4 R)2CO2(As6)] (3a,3b) and [(η5-C5Me4R)CO(As2)]3 (4a,4b). The structure of 2b, 3a and 4a has been elucidated by X-ray crystallography.

1,3,2-dithiazole derivatives - novel model substances for conducting and ferromagnetic materials

Abstract 1,3,2-Dithiazol-2-ylium cations are readily reduced to their corresponding neutral radicals and previous studies have shown that these radicals are, in turn, capable of acting as donors in conducting CT complexes. In this study, a variety of new 1,3,2-dithiazole compounds with anellated isocyclic and heterocyclic rings, have been prepared via different routes. These new compounds were partially characterized by X-ray structure analysis and their ability to form conducting CT complexes studied.

[{(C5Me4R)Ru}3Ru(η3-As3)(μ3,η3-As3)(μ3-As)3], arsenreiche Vierkerncluster☆

Abstract The interaction of [(η5-C5Me4R)Ru(CO)2]2 (1a: R = Me, 1b: R = Et) with yellor arsenic, As4, affords besides the pentaarsaruthenocenes [(η5-As5)Ru(η5-C5Me4R)] (2a, 2b) the tetranuclear clusters [{(η5-C5Me4R)Ru}3Ru(η3-As3)(μ3,η3-As3)(μ3-As)3] (3a, 3b). The structure of 2b and 3b has been elucidated by X-ray analysis.

Photochemische reaktion von pentacarbonyl(1-ethoxy-2-methyl-2-propenyliden)wolfram und dekacarbonyldirhenium

Abstract Upon UV irradiation at 223 K pentacarbonyl (1-ethoxy-2-methyl-2-propenylidene)tungsten ( 1 ) and decacarbonyl-dirhenium ( 2 ) yield enneacarbonyl(μ-η 1:3 -1-ethoxy-2-methyl-2-propenylidene)ditungsten ( 3 ), octacarbonyl(μ-η 1:3 -1-ethoxy-2-methyl-2-propenylidene) dirhenium ( 4 ) and tridecacarbonyl-μ-η 1:3 -1-ethoxy-2-methyl-2-propenylidene)dirhenium-tungsten ( 5 ). The molecular structure of the hetero-trinuclear compound 5 was determined by X-ray structure analysis. The three metal centers form a bent Re-W-Re spine. One of the Re-W bonds is bridged by a carbonyl and the η 1:3 -1-ethoxy-2-methyl-2-propenylidene ligand.

Benzo-1,3,2-diselenazol-2-ylium-Salze – Synthese und Reaktivität / Benzo-1,3,2-diselenazolylium Salts – Synthesis and Reactivity

Benzo-1,3,2-diselenazolylium chloride can be prepared analogously to the corresponding sulfur compound. The cation has been characterized as its perchlorate by X-ray structure analysis. Reduction via the unstable neutral radical state finally affords the nitrogen-free ‘dibenzotetraselenocine’.

[(C5Me4R)TiAs3O6], Moleküle mit einem AB3X6-adamantan-gerüst

Abstract Thermolysis of As 2(4) O 3(6) ( 1 ) with [(η 5 -C 5 Me 4 R) 2 Ti(CO) 2 ] ( 2a : R = Me, 2b : R = Et) affords [(η 5 - C 5 Me 4 R)TiAs 3 O 6 ] ( 3a , 3b ), molecules with an TiAs 3 O 6 adamantane skeleton. The struture of 3b has been elucidated by X-ray analyis.

Acyclic, Cyclic and Polycyclic Pn Ligands

Within the coordination sphere of 10 and 12 to 16 electron LnM transition-metal complex fragments P2 to P6, P8, and P10 have been stabilized as acyclic, cyclic, and polycyclic Pn ligands.