Diboryläthylenverbindungen als liganden in metallkomplexen

Siebert, Walter; Full, Roland; Edwin, Joseph; Kinberger, Klemens; Krüger, Carl

doi:10.1016/s0022-328x(00)91352-4

Cited by 51 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is a well‐known type of reaction that was observed for the first time in 197113 and was later established as a versatile and general synthetic method, e.g. in work with boratabenzene ligands,14 with 2,5‐dihydro‐1,2,5‐thiadiboroles,15 with 1,4‐diboracyclohexadienes,16 and with 1 H ‐borole ligands 17…”

Section: Resultsmentioning

confidence: 98%

Complexes of the (Tetramethylcyclobutadiene)cobalt Fragment with Boratabenzene Ligands and an Unprecedented Formation of a Borabenzene Complex − Structures of (C4Me4)Co(3,5-Me2C5H3BSnMe3) with an Sn−B Bond and of the Dinuclear Complex [(C4Me4)Co(3,5-Me2C5H3B)]2O

Herberich

Baul

Englert

2002

Eur. J. Inorg. Chem.

View full text Add to dashboard Cite

The yellow‐orange boratabenzene complex Cb*Co(3,5‐Me2C5H3BNMe2) (1) (Cb* = C4Me4) was readily obtained from [Cb*Co(NCMe)3]PF6 and Li(TMEDA)(3,5‐Me2C5H3BNMe2). Methanolysis of 1 afforded Cb*Co(3,5‐Me2C5H3BOMe) (2). Complex 2 reacted with MeLi and with BCl3 to give the B‐methyl analogue 3 and the B‐chloro compound 4, respectively. The chloro compound 4 reacted with iBu2AlH, TlF, and LiSnMe3 to afford the B‐hydrido derivative 5, the B‐fluoro complex 6, and the B‐(trimethylstannyl) compound 7, respectively. A single‐crystal structure determination of 7 gave an Sn−B bond length of 2.236(5) Å. The B−O−B‐linked dinuclear complex [(C4Me4)Co(3,5‐Me2C5H3B)]2O (8) was also characterized structurally. The amino compound 1 underwent an unprecedented quaternization with iodomethane to produce [Cb*Co(3,5‐Me2C5H3BNMe3)]I (10) which possesses a borabenzene−trimethylamine ligand. Compound 10 is the first borabenzene complex of a metal outside the chromium group. When treated with Bu4NCN in CH2Cl2 nucleophilic substitution of the NMe3 group took place to give the B−CN derivative 11 which is the first B‐cyanoboratabenzene complex.

show abstract

Section: Resultsmentioning

confidence: 98%

Complexes of the (Tetramethylcyclobutadiene)cobalt Fragment with Boratabenzene Ligands and an Unprecedented Formation of a Borabenzene Complex − Structures of (C4Me4)Co(3,5-Me2C5H3BSnMe3) with an Sn−B Bond and of the Dinuclear Complex [(C4Me4)Co(3,5-Me2C5H3B)]2O

Herberich

Baul

Englert

2002

Eur. J. Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…Im Gegensatz hierzu ist der Diborolenring am Nickel exakt fixiert. Seine Bindungsparameter entsprechen denjenigen der von uns bereits untersuchten 1.2.5-Thiadiborolen-Metallkomplexe [10,11]. Die Atomparameter der vorliegenden Strukturanalyse sind in Tab.…”

Section: Darstellung Und Eigenschaftenunclassified

Darstellung, Eigenschaften und Struktur des Cyclopentadienyl(1.3-diborolenyl)nickel-Sandwiehs [1] / Synthesis, Properties and Structure of the Cyclopentadienyl(1,3-diborolenyl)nickel Sandwich [1]

Siebert¹,

Bochmann²,

Edwin³

et al. 1978

Zeitschrift Für Naturforschung B

Self Cite

View full text Add to dashboard Cite

Abstract 1,3,4,5-Tetraethyl-2-methyl-1,3-diborolene (5) reacts with nickelocene and dimeric cyclopentadienylcarbonylnickel, yielding orange red 4 a, a diamagnetic nickelocene analogue. 1H and 11B NMR data indicate a sandwich structure, which is confirmed by X-ray structure analysis. The title compound crystallizes in the space group Pnma with a = 9.265(I), b = 15.1343(9), c = 12.777(2) Å and four molecules in the unit cell. All metal carbon distances are similar to those of the isoelectronic ferrocene.

show abstract

“…11 The C-S bonds (average 1.76 Å) and the C-B bonds (average 1.55 Å) of 10 are typical of those found for transition-metal complexes of thiophenes, 16 boratabenzenes, 12,13,17 and other heterocycles containing both boron and sulfur. 18,19 The exocyclic B-N bond (1.443 Å) is longer than those of the aminoboratabenzene complexes (1.39-1.41 Å). 12,17 Weaker B-N π bonding is independently shown by the low rotation barrier about the B-N bond.…”

mentioning

confidence: 99%