Determination of the Free Activation Energies for the Interconversion of Isomers of 2,4-Pentadienyldipropylborane via Consecutive 1,3-Boron Shifts

Mikhail E. Gurskii; Ilya D. Gridnev; Alexei V. Geiderikh; Anatoly V. Ignatenko; Yuri N. Bubnov; Vadim I. Mstislavsky; Yuri A. Ustynyuk

doi:10.1021/om00060a022

Determination of the Free Activation Energies for the Interconversion of Isomers of 2,4-Pentadienyldipropylborane via Consecutive 1,3-Boron Shifts

Mikhail E. Gurskii, Ilya D. Gridnev, Alexei V. Geiderikh, Anatoly V. Ignatenko, Yuri N. Bubnov, Vadim I. Mstislavsky, Yuri A. Ustynyuk

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The fluxional behavior of the E (4a) and Z (4b) isomers of 2,4-pentadienyldipropylborane has been studied by dynamic ¹H and ¹³C NMR spectroscopy. Activation barriers have been determined for degenerate metallotropic rearrangements of 4a and 4b and for 4a ⇄ 4b interconversion by complete line shape analysis of ¹³C DNMR spectra. The data obtained suggest that only 1,3 shifts of BPr₂ groups take place in both isomers rather than 1,5 sigmatropic shifts.

Original language	English
Pages (from-to)	4056-4061
Number of pages	6
Journal	Organometallics
Volume	11
Issue number	12
DOIs	https://doi.org/10.1021/om00060a022
Publication status	Published - 1992 Dec 1
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry

Access to Document

10.1021/om00060a022

Cite this

@article{173f231540934658996991236a9a3d5c,

title = "Determination of the Free Activation Energies for the Interconversion of Isomers of 2,4-Pentadienyldipropylborane via Consecutive 1,3-Boron Shifts",

abstract = "The fluxional behavior of the E (4a) and Z (4b) isomers of 2,4-pentadienyldipropylborane has been studied by dynamic 1H and 13C NMR spectroscopy. Activation barriers have been determined for degenerate metallotropic rearrangements of 4a and 4b and for 4a ⇄ 4b interconversion by complete line shape analysis of 13C DNMR spectra. The data obtained suggest that only 1,3 shifts of BPr2 groups take place in both isomers rather than 1,5 sigmatropic shifts.",

author = "Gurskii, {Mikhail E.} and Gridnev, {Ilya D.} and Geiderikh, {Alexei V.} and Ignatenko, {Anatoly V.} and Bubnov, {Yuri N.} and Mstislavsky, {Vadim I.} and Ustynyuk, {Yuri A.}",

year = "1992",

month = dec,

day = "1",

doi = "10.1021/om00060a022",

language = "English",

volume = "11",

pages = "4056--4061",

journal = "Organometallics",

issn = "0276-7333",

publisher = "American Chemical Society",

number = "12",

}

TY - JOUR

T1 - Determination of the Free Activation Energies for the Interconversion of Isomers of 2,4-Pentadienyldipropylborane via Consecutive 1,3-Boron Shifts

AU - Gurskii, Mikhail E.

AU - Gridnev, Ilya D.

AU - Geiderikh, Alexei V.

AU - Ignatenko, Anatoly V.

AU - Bubnov, Yuri N.

AU - Mstislavsky, Vadim I.

AU - Ustynyuk, Yuri A.

PY - 1992/12/1

Y1 - 1992/12/1

N2 - The fluxional behavior of the E (4a) and Z (4b) isomers of 2,4-pentadienyldipropylborane has been studied by dynamic 1H and 13C NMR spectroscopy. Activation barriers have been determined for degenerate metallotropic rearrangements of 4a and 4b and for 4a ⇄ 4b interconversion by complete line shape analysis of 13C DNMR spectra. The data obtained suggest that only 1,3 shifts of BPr2 groups take place in both isomers rather than 1,5 sigmatropic shifts.

AB - The fluxional behavior of the E (4a) and Z (4b) isomers of 2,4-pentadienyldipropylborane has been studied by dynamic 1H and 13C NMR spectroscopy. Activation barriers have been determined for degenerate metallotropic rearrangements of 4a and 4b and for 4a ⇄ 4b interconversion by complete line shape analysis of 13C DNMR spectra. The data obtained suggest that only 1,3 shifts of BPr2 groups take place in both isomers rather than 1,5 sigmatropic shifts.

UR - http://www.scopus.com/inward/record.url?scp=0346097337&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346097337&partnerID=8YFLogxK

U2 - 10.1021/om00060a022

DO - 10.1021/om00060a022

M3 - Article

AN - SCOPUS:0346097337

SN - 0276-7333

VL - 11

SP - 4056

EP - 4061

JO - Organometallics

JF - Organometallics

IS - 12

ER -

Determination of the Free Activation Energies for the Interconversion of Isomers of 2,4-Pentadienyldipropylborane via Consecutive 1,3-Boron Shifts

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this