(Tetramethylcyclobutadiene)cobalt chemistry

Kudinov, Alexander R.; Mutseneck, Elena V.; Loginov, Dmitry A.

doi:10.1016/j.ccr.2004.03.008

Cited by 63 publications

(26 citation statements)

References 122 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[2,3] One method is based on the reaction of the (carbonyl)iodide complex Cb*Co(CO) 2 I with the corresponding anions, while another one uses the acetonitrile complex [Cb*Co-(MeCN) 3 ] + as a starting material. The second method is more general, allowing Cb*Co(C 4 R 4 E) compounds to be synthesized in higher yields under milder conditions.…”

Section: Introductionmentioning

confidence: 99%

(Tetramethylcyclobutadiene)cobalt Complexes with Tricarbollide Ligands

et al. 2006

View full text Add to dashboard Cite

Reactions of the 11‐vertex nido‐tricarbollide anions [7,8,9‐C3B8H11]– (2a) and [7,8,10‐C3B8H11]– (3) with [Cb*Co(MeCN)3]+ or [Cb*Co(C6H6)]+ (Cb* = C4Me4) afford the expected cobaltatricarbollides 1‐Cb*‐1,2,3,4‐CoC3B8H11 (4a) and 1‐Cb*‐1,2,3,5‐CoC3B8H11 (5), respectively. A similar reaction of the amino‐substituted anion [7‐tBuNH‐7,8,9‐C3B8H10]– (2b) is accompanied by polyhedral rearrangement even at room temperature, giving 1‐Cb*‐12‐tBuNH‐1,2,4,12‐CoC3B8H10 (7b). Complex 4a rearranges to the isomeric complex 5 at 110 °C and further to 1‐Cb*‐1,2,4,10‐CoC3B8H11 (6a) at 160 °C. The amino‐substituted derivative 1‐Cb*‐10‐tBuNH‐1,2,4,10‐CoC3B8H10 (6b) was obtained by isomerization of 7b at 160 °C. The observed rearrangement sequence for Cb*CoC3B8H11 correlates well with the relative stabilities of nonmethylated analogs estimated by DFT calculations. The structures of 4a and 7b were determined by X‐ray diffraction. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

show abstract

Section: Introductionmentioning

confidence: 99%

(Tetramethylcyclobutadiene)cobalt Complexes with Tricarbollide Ligands

et al. 2006

View full text Add to dashboard Cite

show abstract

“…1- 6 We have recently de scribed the efficient methods for the syntheses of the co balt tetramethylcyclobutadiene complexes with five elec tron ligands of different types. [7][8][9][10][11][12][13] In this work, we syn thesized the [Cb*CoL] + complexes (Cb* = C 4 Me 4 , L is polyarene).…”

mentioning

confidence: 99%

Synthesis of cationic complexes [(C4Me4)CoL]+ (L is naphthalene, phenanthrene, and anthracene)

et al. 2007

View full text Add to dashboard Cite

show abstract

“…It is also conceivable that TMCBD would exhibit additional stability, becaues it is known that methyl groups favor the formations of similar rings. 24 Thus, theoretical studies, like the one we propose here, may also shed some light into the characteristics of the whole transformation process and the spectroscopic changes expected for the identification of the products.…”

Section: Introductionmentioning

confidence: 96%

Modeling high pressure reactivity in unsaturated systems: Application to dimethylacetylene

Mediavilla¹,

Tortajada²,

Baonza³

2008

J Comput Chem

View full text Add to dashboard Cite

A general model is introduced to study pressure-induced reactivity on unsaturated systems in the condensed state. The model is applied here to dimethylacetylene (DMA) in the solid phase II (C/2m) because it has been proposed that two DMA molecules can react to form tetramethyl-cyclobutadiene (TMCBD). The proposed reaction process has been modeled by studying the structural and electronic changes undergone by two DMA molecules as they approach each other preserving the crystal symmetry of phase II. Both monodeterminantal (MP2 and DFT) and multideterminantal (CASSCF and MRMP2) methodologies were used to check the reliability of our model in predicting the reactivity of the system under compression. In all cases, structural results are in agreement with low-temperature diffraction experiments for the solid phase II. Our model indicates that DMA is expected to form the TMCBD dimer at intermolecular distances close to 2 A. This value is in excellent agreement with previous calculations on the existence of long carbon-carbon bonds.

show abstract

(Tetramethylcyclobutadiene)cobalt chemistry

Cited by 63 publications

References 122 publications

(Tetramethylcyclobutadiene)cobalt Complexes with Tricarbollide Ligands

(Tetramethylcyclobutadiene)cobalt Complexes with Tricarbollide Ligands

Synthesis of cationic complexes [(C4Me4)CoL]+ (L is naphthalene, phenanthrene, and anthracene)

Modeling high pressure reactivity in unsaturated systems: Application to dimethylacetylene

Contact Info

Product

Resources

About