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Os-187 subspectra in H-1 and P-31{H-1} spectra of triosmium carbonyl clusters

Stchedroff, MJ; Aime, S; Gobetto, R; Salassa, L and Nordlander, Ebbe LU (2002) In Magnetic Resonance in Chemistry 40(2). p.107-113
Abstract
A survey of the use of Os-187 satellite subspectra in H-1 and P-31{H-1} spectra of triosmium carbonyl clusters is reported. By varying evolution delays in HMQC spectra of [Os-3(mu-H)(2)(CO)(10)] we have selectively extracted the values for (1)J(Os,H) and (2)J(Os,H), respectively. An analysis of the principal modes of phosphine coordination in triosmium clusters demonstrates that P-31{H-1} Os-187 satellite subspectra are diagnostic for equatorial coordination [(1)J(Os, P) = 211-223 Hz] or for axial coordination (perpendicular to the plane of the cluster) [(1)J(Os, P) approximate to 147 Hz]. Chelating and bridging diphosphines yield Os-187 satellite subspectra which are the sum of A(2)X and AA'X spin systems. If significant P-P coupling is... (More)
A survey of the use of Os-187 satellite subspectra in H-1 and P-31{H-1} spectra of triosmium carbonyl clusters is reported. By varying evolution delays in HMQC spectra of [Os-3(mu-H)(2)(CO)(10)] we have selectively extracted the values for (1)J(Os,H) and (2)J(Os,H), respectively. An analysis of the principal modes of phosphine coordination in triosmium clusters demonstrates that P-31{H-1} Os-187 satellite subspectra are diagnostic for equatorial coordination [(1)J(Os, P) = 211-223 Hz] or for axial coordination (perpendicular to the plane of the cluster) [(1)J(Os, P) approximate to 147 Hz]. Chelating and bridging diphosphines yield Os-187 satellite subspectra which are the sum of A(2)X and AA'X spin systems. If significant P-P coupling is present, the AA'X component requires simulation. All observed (2)J(Os,P) trans-equatorial couplings fall in the range 38-65 Hz. Copyright (C) 2001 John Wiley Sons, Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
constants, coupling, satellite analysis, H-1 NMR, P-31 NMR, NMR, Os-187 NMR, triosmium carbonyl clusters
in
Magnetic Resonance in Chemistry
volume
40
issue
2
pages
107 - 113
publisher
John Wiley & Sons
external identifiers
  • wos:000173435300002
  • scopus:0012817958
ISSN
1097-458X
DOI
10.1002/mrc.962
language
English
LU publication?
yes
id
e195a20b-be3f-478f-bcc6-770cdf878267 (old id 344379)
date added to LUP
2007-11-14 14:08:39
date last changed
2017-01-01 04:56:30
@article{e195a20b-be3f-478f-bcc6-770cdf878267,
  abstract     = {A survey of the use of Os-187 satellite subspectra in H-1 and P-31{H-1} spectra of triosmium carbonyl clusters is reported. By varying evolution delays in HMQC spectra of [Os-3(mu-H)(2)(CO)(10)] we have selectively extracted the values for (1)J(Os,H) and (2)J(Os,H), respectively. An analysis of the principal modes of phosphine coordination in triosmium clusters demonstrates that P-31{H-1} Os-187 satellite subspectra are diagnostic for equatorial coordination [(1)J(Os, P) = 211-223 Hz] or for axial coordination (perpendicular to the plane of the cluster) [(1)J(Os, P) approximate to 147 Hz]. Chelating and bridging diphosphines yield Os-187 satellite subspectra which are the sum of A(2)X and AA'X spin systems. If significant P-P coupling is present, the AA'X component requires simulation. All observed (2)J(Os,P) trans-equatorial couplings fall in the range 38-65 Hz. Copyright (C) 2001 John Wiley Sons, Ltd.},
  author       = {Stchedroff, MJ and Aime, S and Gobetto, R and Salassa, L and Nordlander, Ebbe},
  issn         = {1097-458X},
  keyword      = {constants,coupling,satellite analysis,H-1 NMR,P-31 NMR,NMR,Os-187 NMR,triosmium carbonyl clusters},
  language     = {eng},
  number       = {2},
  pages        = {107--113},
  publisher    = {John Wiley & Sons},
  series       = {Magnetic Resonance in Chemistry},
  title        = {Os-187 subspectra in H-1 and P-31{H-1} spectra of triosmium carbonyl clusters},
  url          = {http://dx.doi.org/10.1002/mrc.962},
  volume       = {40},
  year         = {2002},
}