A General Route for the Synthesis of Triazacyclononane Functionalised with Pendant Phosphane Arms − Crystal Structures of [NiL1Cl(HOEt)][ClO4] and [NiL1(NCS)2] with L1 =N-(Diphenylphosphanylpropyl)-1,4,7-triazacyclononane

Ellis, David; Farrugia, Louis J.; Lovatt, Paul A.; Peacock, Robert D.

doi:10.1002/1099-0682(200007)2000:7<1489::aid-ejic1489>3.0.co;2-y

Cited by 6 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NMR spectra of this product were qualitatively very similar to that of 3, except that the alkylidene CH resonance shifted significantly (from 4.205 ppm ( 1 H) and 57.4 ppm ( 13 C) in 3 to 5.517 ppm ( 1 H) and 93.5 ppm ( 13 C) in 8). Additionally, the 7 Li NMR resonance shifted considerably, from 2.986 ppm (3) to 1.874 ppm (8). On the basis of these data, an insertion of CO at the alkylidene functionality to form a ketene complex (8) was postulated, which was subsequently confirmed by X-ray crystallography (Figure 4).…”

Section: Resultsmentioning

confidence: 67%

“…The use of 1,4,7-triazacyclononane (tacn) as a ligand in coordination chemistry has been well explored over the past few decades, with numerous reports appearing recently. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Two main features make this nine-membered macrocycle a useful ligand. First, its three nitrogen atoms provide for tridentate, facial coordination to a metal center.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reactions of a Triazacyclononane-Supported Tantalum−Lithium Bridging Alkylidene with Organic Substrates

Schmidt

Arnold

2002

Organometallics

View full text Add to dashboard Cite

The reactivity of a range of electrophilic organic substrates with a heterobimetallic tantalum-lithium bridging alkylidene [(Me 3 SiCH 2 )(ArNd)Ta(µ-CHSiMe 3 )(µ-η 1 :η 3 -i Pr 2 -tacn)-Li, 3] is presented. Proton sources of widely varying acidity react to protonate the alkylidene ligand, leading to an interesting tantalum-lithium bridging hydride complex in the case of H 2 . The alkylidene 3 undergoes a series of insertion reactions with unsaturated substrates, such as acetonitrile, carbon monoxide, and carbon disulfide; it also reacts with an acid chloride to yield a tantalum enolate species featuring return of the i Pr 2 -tacnligand to a tridentate coordination mode. The incorporated lithium in 3 played an important role, at least structurally, in the chemistry observed.

show abstract

Section: Resultsmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Reactions of a Triazacyclononane-Supported Tantalum−Lithium Bridging Alkylidene with Organic Substrates

Schmidt

Arnold

2002

Organometallics

View full text Add to dashboard Cite

show abstract

“…This control over co-ordination is not matched in those previous N n ,P-ligands with flexible alkyl "linkers". 14-16,18,19,20, 23 5. Mononuclear complexes in which the phosphine group is selectively bound to a soft metal leaving the N n -donor domain dangling and metal-free are directly available by addition of a meta-substituted ligand such as L 3 or L 4 to a source of a softer metal ion.…”

Section: Discussionmentioning

confidence: 99%