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Cited by 11 publications
(8 citation statements)
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“…We assumed that the three observed resonance manifolds could be attributed to three conformationally different segments in N-φ-PIM . We have also confirmed that the “merry-go-round” mechanism is indeed viable, and our results were also consistent with the idea that this mechanism occurs around a Ni(I) ionic center, which delivers the helical conformation found initially. Others have recently shown theoretically that the helical conformation is not the most stable, and thus, we offer this paper as experimental support of this theoretical work.…”
supporting
confidence: 85%
See 1 more Smart Citation
“…We assumed that the three observed resonance manifolds could be attributed to three conformationally different segments in N-φ-PIM . We have also confirmed that the “merry-go-round” mechanism is indeed viable, and our results were also consistent with the idea that this mechanism occurs around a Ni(I) ionic center, which delivers the helical conformation found initially. Others have recently shown theoretically that the helical conformation is not the most stable, and thus, we offer this paper as experimental support of this theoretical work.…”
supporting
confidence: 85%
“…The above observation is consistent with our proposal that sterically unencumbered N-φ-PIM contains a syndio -like conformation that we previously called the transition domain connecting helical s - cis segments and linear s - trans segments. Even though the PIM polymers can be prepared so that the helical conformation predominates initially, manipulation of these “as-prepared” materials 1 has the potential of unraveling this helix, especially when the substituent is sterically undemanding, i.e., the rigid rod character of some PIM polymers is not established . Anticipated applications 13a for the PIM polymers will thus have to account for the fact that rigid rod character will most likely only be maintained when the N-substituent of PIM polymers is sterically demanding.…”
mentioning
confidence: 99%
“…The homopolymers 5 were prepared (Scheme ) in dry CH 2 Cl 2 , using NiCl 2 ·6H 2 O as catalyst, at a concentration of freshly prepared isocyanide monomer of approximately 200 mM. Air was allowed to be present during the reactions, as it has been shown to be involved during the catalysis in polymerizations of this type. , The polymerizations proceeded in good to excellent yields, ranging from 68% up to 96%, the majority being in excess of 80%. The conversion of the monomers into the polymers was confirmed by IR, 1 H, and 13 C NMR spectroscopies, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), polarimetry, UV−vis spectroscopy, and circular dichroism (CD) spectrometry.…”
Section: Resultsmentioning
confidence: 99%
“…In the particular case of the isonitrile function, insertion was first observed in an organometallic nickel(II) system . Isonitriles are now recognized as potent reagents, more reactive than the isoelectronic CO molecule, and their insertion chemistry spans several metal−ligand bond types including M−H, M−C, M−N, M−O, M−P, and M−S . In this work we explore the reactivity of the isonitrile function toward the four-membered metallacycle 1 .…”
Section: Introductionmentioning
confidence: 99%