Otto J. Scherer

Umsetzung von P4 mit (η5-C5H5)(CO)2MoMo(CO)2(η5-C5H5) zu den tetraedrischen molybdänkomplexen Pn[Mo(CO)2(η5-C5H5)]4-n (n = 2,3)

Abstract Interaction of (η 5 -C 5 H 5 ) 2 Mo 2 (CO) 4 , (I) with P 4 affords the tetrahedral molybdenum complexes P n [Mo(CO) 2 (η 5 -C 5 H 5 )] 4- n (II, n = 3 and III, n = 2). The structure of III has been elucidated by X-ray analysis.

(E2)2-einheiten (E = P, As) als clusterbausteine

Abstract The interaction of [C p ★ 2(CO)4Mo2](MoMo) (I) with As4 gives the Mo-As clusters [C p ★ (CO)2Mo(η3-As3)] (II), [C p ★ (CO)4Mo2(μ,η2-As2)] (III) and cis-[C p ★ (CO)Mo(μ,η2-As2)]2 (IV). IV probably has the same structure as cis-[C p ★ (CO)Mo(μ,η2-P2)]2 cis-[C p ★ (CO)Mo(μ-η2-P2)]2 (V) whose derivative, cis-[C p ★ (CO)Mo(μ,η2-P2){Cr(CO)5}2]2 (VI) (C p ★ = η5-C5Me5) has been characterized by an X-ray structure analysis.

Ferrocene mit einem Pentaarsacyclopentadienyl-Liganden

Abstract Thermolysis of [(η 5 -C 5 Me 4 R)Fe(CO) 2 ] 2 ( 1a : R = Me, 1b : R = Et) with yellow arsenic, As 4 , gives the sandwich complexes [(η 5 -As 5 )Fe(η 5 -C 5 Me 4 R)] ( 2a : R = Me, 2b : R = Et) with a pentaarsacyclopentadienyl ligand. In a stacking reaction 2a forms the triple-decker sandwich cation [(η 5 -C 5 H 5 )Fe(μ, η 5 -As 5 )Fe(η 5 -C 5 Me 5 )]PF 6 ( 3 ) with 30 valence electrons. 2b und 3 have been characterized by X-ray diffraction studies.

Silylierte organometallamine des arsens, antimons und wismuts

Zusammenfassung Lithium(trimethylsilyl)methylamid reagiet mit Alkyhalogen-Verbindungen des Arsens, Antimons und Wismuts unter Bildung monosilylierter Metallamine der allgemeinen Zusammensetzung: [(CH 3 ) 3 SiNCH 3 ] n M(CH 3 ) 3− n (M = As, Sb und Bi; n = 1–3). Die physikalischen Eigenschaften sowie Protonenresonanzspektren dieser Verbindungen werden beschrieben und diskutiert.

[(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.

Activation of P4 and P2 by Transition Metal Complexes at Room Temperature

The first complex with P2 as an eight-electron donor diphosphinidene ligand is 1, which forms at room temperature from [Cp*(OC)2 Re]2 and P4 (Cp*=C5 Me5 ). The by-product of this reaction, which has a Re2 P2 butterfly structure, reacts with [W(CO)5 (thf)] at room temperature to give two multinuclear complexes-one with a ReWP2 tetrahedrane framework and 2, whose six atoms Re2 P2 W2 form a plane and in which the P2 ligand of the butterfly complex is converted into two µ-P ligands.

Tetraarsacyclobutadien als komplexligand

Abstract Photolysis of [Cp★Nb(CO)4] (1), Cp★ = η5-C5Me5, and yellow arsenic, As4, gives [Cp★(CO)2Nb(η4-As4)] (2) as well as [{Cp★(CO)Nb}2(As2)2] (3). An X-ray diffraction study of 2 reveals a planar cyclo-As4 (tetraarsacyclobutadiene) as ligand.

[Cp*Fe(η5‐P5)] as a Useful Source for the Synthesis of Cobalt Complexes with “Naked” Pn Ligands

A rich diversity of CpRCo complexes with “naked” Pn ligands is obtained upon treatment of [Cp*Fe(η5-P5)] (1) with [CpRCo(CO)2], CpR= C5H4tBu, C5H3tBu2-1,3. Besides the “triple decker” (shown right) with a planar CoP4 middle deck, clusters with trigonal bipyramidal and cubanelike Co3P2, Co4P4, and FeCo2P5 skeletons have been synthesized. The hitherto unknown μ4-η5:η2:η2:η1-coordination mode of the cyclo-P5 ligand in the complex [{Cp*′FeP5}{Co3Cp3R(CO)2}] has been realised. The coordinative stabilization of PS and PSe ligands is described.

[(η5-C5H4R)(CO)3Cr]2Cr(μ,η5-As5)Cr(η5-C5H4Me)], ein Tripeldecker-Sandwichkomplex mit unverzerttem cyclo-As5-Mitteldeck

Abstract Thermolysis of [(η 5 -C 5 H 4 R)(CO) 3 Cr] 2 ( 1a ), R  H; ( 1b ), R  Me, with yellow arsenic (As 4 ) gives the triple-decker sandwich complexes [(η 5 -C 5 H 4 R)Cr(μ,η 5 -As 5 )Cr(η 5 -C 5 H 4 R)] ( 2b ), R  Me, the structure of which has been determined by X-ray crystallography.

Elementorganische amin/imin-verbindungen : IX. Metallorganische aminophosphinimine☆

Abstract Oxidation of aminophoshines by trimethysilyl azide yields N-silylated aminophosphimines, which can be alcoholized, metalated and transformed into different substituted N-and N,N′ -organometallic aminophosphinimines [(CH3)3C]2- P[N-M(CH3)3](NHR): A (R = H), B (RCH3);[(CH3)3C]2P[N-M(CH3)3]- [NRM′(CH3)3]:C(RH), D(RCH3);[(CH3)3C]2P[N-M(CH33][N(CH32]: E(M = M′= Si,Ge,Sn).D forms stable N,N′-organometallic aminophosphinimine isomers and can be used as ’1H NMR reference signal to identify (CH33M ligands which are bonded to immune or amine nitrogen atoms.