Tantalum(I) alkyne complexes:  Ta(CO)2(.eta.2-RC.tplbond.CR)(I)L2

McGeary, Michael J.; Gamble, A. S.; Templeton, Joseph L.

doi:10.1021/om00092a006

Cited by 35 publications

(22 citation statements)

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“…116 Templeton has carried out extensive studies of rotational barriers of alkynes and has calculated a number of rotational energy profiles; his papers provide leading references to earlier work. 118 Pyrazolylborate analogues also show similar behavior 119 and this work as well as earlier reviews provides leading references. 13,20 ring closing metathesis 120-122 and the preparation of relatively stable carbenes that are active catalysts.…”

Section: Rotations Of Alkynes In Cyclopentadienyl Complexessupporting

confidence: 61%

Stereochemical Nonrigidity of Organometallic Complexes

Faller

2005

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Compounds that undergo intramolecular rearrangements at rates that affect the NMR line shapes in generally accessible temperature ranges are described as stereochemically nonrigid. Analysis of 1D and 2D NMR spectra as a function of temperature often allow the rates, as well as the mechanisms of interconversion of conformers or isomers, to be determined. Examples were selected to illustrate the importance of stereochemical nonrigidity in reactivity and the potential for affecting stereochemistry in the products of reactions.

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Section: Rotations Of Alkynes In Cyclopentadienyl Complexessupporting

confidence: 61%

Stereochemical Nonrigidity of Organometallic Complexes

Faller

2005

Encyclopedia of Inorganic and Bioinorganic Chemistry

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“…118 Pyrazolylborate analogues also show similar behavior 119 and this work as well as earlier reviews provides leading references. ring closing metathesis 120-122 and the preparation of relatively stable carbenes that are active catalysts.…”

supporting

confidence: 61%

Stereochemical Nonrigidity of Organometallic Complexes

Faller¹

2005

Encyclopedia of Inorganic Chemistry

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“…The 31 P{ 1 H} NMR spectrum showed only one chemical shift. Appearance of acetylene carbons (C(a) and C(b)) at 199.5 ppm and 185.7 ppm in 13 C NMR also confirms 4 electron donation from the acetylene [6][7][8][9][10][11]. Analogous carbon chemical shifts are seen for…”

Section: Reaction Of Os(h) 2 Cll 2 X and Phcchmentioning

confidence: 71%

“…An alkyne proton was observed at 14.1 ppm as a triplet (J = 2.7 Hz) of doublets (J = 3.3 Hz) which couples to 2 P and to a hydride, respectively. This unusual chemical shift indicates 4-electron donation from acetylene to the metal [6][7][8][9][10][11]. One of two hydrides in the resulting adduct 2a was observed at À0.8 ppm as a triplet of doublets of doublets, coupled to two phosphines, to the alkynyl proton and to the other hydride.…”

Section: Reaction Of Os(h) 2 Cll 2 X and Phcchmentioning

confidence: 99%