2019
DOI: 10.1002/ejic.201900302
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[Ni3(iPr2Im)3(µ2‐CO)3(µ3‐CO)] – A CO‐Stabilized NHC Analogue of the Parent Neutral Nickel Chini‐Type Cluster

Abstract: The reactivity of nickel tetracarbonyl [Ni(CO) 4 ] with the N-Heterocyclic Carbenes (NHCs) 1,3-diisopropylimidazolin-2-ylidene (iPr 2 Im) and 1,3-di(isopropyl)-4,5-di(methyl)imidazolin-2-ylidene (iPr 2 Im Me ) is reported. The reaction of [Ni(CO) 4 ] with two equiv. iPr 2 Im and iPr 2 Im Me and one equiv. iPr 2 Im Me leads to the formation of the complexes [Ni(iPr 2 Im) 2 (CO) 2 ] 2, [a]

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Cited by 17 publications
(9 citation statements)
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“…Ni 3 triangles are a common structure motif, for example, in carbonyl-or phosphine-stabilised clusters. [17] The Ni 3 triangle is capped by two phosphorus atoms P1 and P4. The P4 atom is part of a P 3 -chain with PÀP bond lengths of 2.1671(5) (P2ÀP3) and 2.1754(5) (P3ÀP4), which are in the range commonly observed for PÀP single bonds.…”
mentioning
confidence: 99%
“…Ni 3 triangles are a common structure motif, for example, in carbonyl-or phosphine-stabilised clusters. [17] The Ni 3 triangle is capped by two phosphorus atoms P1 and P4. The P4 atom is part of a P 3 -chain with PÀP bond lengths of 2.1671(5) (P2ÀP3) and 2.1754(5) (P3ÀP4), which are in the range commonly observed for PÀP single bonds.…”
mentioning
confidence: 99%
“…The former (2.737(3)−2.782(3) Å, avg 2.755(3) Å) are considerably shorter than in {(Ge 9 ) 2 [η 6 -Ge(PdPPh 3 ) 3 ]} 4− (2.795(2)−2.906(2) Å, avg 2.837 Å), owing to the later with three sterically much more demanding PdPPh 3 ligands coordinating to the interstitial germanium atom. 28 The central 36 and [(Ni@Ge 9 )Ni(Ni@Ge 9 )] 4− (2.40 Å), 37 indicative of the lack of metal−metal bonding.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
“…Complex [Ni 2 (CO) 4 (µ 2 ‐CO)(µ 2 ‐CDP Me )] ( 2 ) represents a rare example of a neutral dinuclear Ni 2 (CO) 5 carbonyl moiety coordinated by a C donor ligand . Radius and co‐workers recently reported on a comparable neutral NHC‐stabilized trinuclear Ni(0) carbonyl cluster complex [Ni 3 ( i Pr 2 Im) 3 (µ 2 ‐CO) 3 (µ 3 ‐CO)] ( i Pr 2 Im: 1,3‐diisopropyl‐imidazolin‐2‐ylidene) …”
Section: Resultsmentioning
confidence: 99%
“…The Ni–Ni bond lengths in other Ni carbonyl cluster complexes are usually shorter (approx. 235 pm) , . The decrease in the Ni–Ni distance in 2 compared to the parent compound [Ni 2 (CO) 6 (µ 2 ‐CO)] can be attributed to the substitution of two terminal CO ligands by the bridging CDP Me ligand, which causes in the compression of the Ni‐(µ 2 ‐CO)‐Ni unit and results in acute angles of Ni1–C1–Ni2 (73.7(2) °) and Ni1–C28–Ni2 (80.0(2) °).…”
Section: Resultsmentioning
confidence: 99%