N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions

Hagemann M, Berger R, Hayes SA, Stammler H-G, Mitzel NW (2008)
CHEMISTRY-A EUROPEAN JOURNAL 14(35): 11027-11038.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
Download
Es wurde kein Volltext hochgeladen. Nur Publikationsnachweis!
Autor/in
Abstract / Bemerkung
N,N-Dimethylaminopropylsilane H3Si(CH2)(3)NMe2 was synthesised by the reaction of (Meo)(3)Si(CH2)(3)NMe2 with lithium aluminium hydride. Its solid-state structure was determined by X-ray diffraction, which revealed a five-membered ring with an Si center dot center dot center dot N distance of 2.712(2) angstrom. Investigation of the structure by gas-phase electron diffraction (GED), ab initio and density functional calculations and IR spectroscopy revealed that the situation in the gas phase is more complicated, with at least four conformers present in appreciable quantities. Infrared spectra indicated a possible Si center dot center dot center dot N interaction in the Si-H stretching region (2000-2200 cm(-1)), as the approach of the nitrogen atom in the five-membered ring weakens the bond to the hydrogen atom in the trans position. Simulated gas-phase IR spectra generated from ab initio calculations (MP2/TZVPP) exhibited good agreement with the experimental spectrum. A method is proposed by which the fraction of the conformer with a five-membered ring can be determined by a least-squares fit of the calculated to experimental absorption intensities. The abundance of this conformer was determined as 23.7(6)%, in good agreement with the GED value of 24(6)%. The equilibrium Si center dot center dot center dot N distance predicted by theory for the gas-phase structure was highly variable, ranging from 2.73 (MP2) to 3.15 angstrom (HF). The value obtained by GED is 2.91(4) angstrom, which could be confirmed by a scan of the potential-energy surface at the DF-LCCSD[T] level of theory. The nature of the weak dative bond in H,Si(CH2)(3)NMe2 can be described in terms of attractive inter-electronic correlation forces (dispersion) and is also interpreted in terms of the topology of the electron density.
Stichworte
conformation analysis; IR; electron diffraction; spectroscopy; ab initio calculations; silanes
Erscheinungsjahr
2008
Zeitschriftentitel
CHEMISTRY-A EUROPEAN JOURNAL
Band
14
Ausgabe
35
Seite(n)
11027-11038
ISSN
0947-6539
eISSN
1521-3765
Page URI
https://pub.uni-bielefeld.de/record/1636362

Zitieren

Hagemann M, Berger R, Hayes SA, Stammler H-G, Mitzel NW. N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions. CHEMISTRY-A EUROPEAN JOURNAL. 2008;14(35):11027-11038.
Hagemann, M., Berger, R., Hayes, S. A., Stammler, H. - G., & Mitzel, N. W. (2008). N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions. CHEMISTRY-A EUROPEAN JOURNAL, 14(35), 11027-11038. doi:10.1002/chem.200801273
Hagemann, M., Berger, R., Hayes, S. A., Stammler, H. - G., and Mitzel, N. W. (2008). N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions. CHEMISTRY-A EUROPEAN JOURNAL 14, 11027-11038.
Hagemann, M., et al., 2008. N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions. CHEMISTRY-A EUROPEAN JOURNAL, 14(35), p 11027-11038.
M. Hagemann, et al., “N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions”, CHEMISTRY-A EUROPEAN JOURNAL, vol. 14, 2008, pp. 11027-11038.
Hagemann, M., Berger, R., Hayes, S.A., Stammler, H.-G., Mitzel, N.W.: N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions. CHEMISTRY-A EUROPEAN JOURNAL. 14, 11027-11038 (2008).
Hagemann, Michael, Berger, Raphael, Hayes, Stuart A., Stammler, Hans-Georg, and Mitzel, Norbert W. “N,N-Dimethylaminopropylsilane: A Case Study on the Nature of Weak Intramolecular Si center dot center dot center dot N Interactions”. CHEMISTRY-A EUROPEAN JOURNAL 14.35 (2008): 11027-11038.

Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®

Quellen

PMID: 18973161
PubMed | Europe PMC

Suchen in

Google Scholar