Structural and Energetic Properties of Haloacetonitrile–BCl3 Complexes: Computations and Matrix-IR Spectroscopy

2017 ◽  
Vol 121 (48) ◽  
pp. 9252-9261 ◽  
Author(s):  
James A. Phillips ◽  
Samuel J. Danforth ◽  
Nicholas J. Hora ◽  
John R. Lanska ◽  
Anna W. Waller
Keyword(s):  
Ir Spectroscopy ◽  
Energetic Properties ◽  
Matrix Ir Spectroscopy

ChemInform Abstract: Direct Study of Unstable Dimethylgermathione, Me2Ge=S, by Vacuum Pyrolysis-MS and Low-Temperature Matrix IR Spectroscopy.

ChemInform ◽  
2010 ◽  
Vol 22 (18) ◽  
pp. no-no
Author(s):  
V. N. KHABASHESKU ◽  
S. E. BOGANOV ◽  
P. S. ZUEV ◽  
O. M. NEFEDOV ◽  
J. TAMAS ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ir Spectroscopy ◽  
Direct Study ◽  
Vacuum Pyrolysis ◽  
Temperature Matrix ◽  
Matrix Ir Spectroscopy

Cycloalkylidenselenoketene durch Pyrolyse von 1,2,3-Selenadiazolen — Untersuchungen mit der temperaturabhängigen PE-Spektroskopie und Matrix-IR-Spektroskopie [1]

1984 ◽  
Vol 39 (11) ◽  
pp. 1536-1540 ◽  
Author(s):  
Reinhard Schulz ◽  
Armin Schweig
Keyword(s):  
Liquid Phase ◽  
Ir Spectroscopy ◽  
Ir Spectra ◽  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Variable Temperature ◽  
Matrix Ir Spectroscopy

Abstract The gas-phase pyrolysis of cyclohexeno-1,2,3-selenadiazole and cycloocteno-1,2,3-selenadiazole has been investigated by variable temperature photoelectron spectroscopy and matrix IR spectroscopy. The ring contracted, highly reactive products cyclopentylidenselenoketene (cyclopentylidenmethanselone) and cycloheptylidenselenoketene (cycloheptylidenmethanselone) - which had not been found in liquid phase thermolysis experiments - have been detected. Additionally HeI photoelectron and IR spectra of analogous ketenes and thioketenes are presented for comparative reasons.

Pyrido[1,2-a]pyrimidinones and Thiazolo[3,2-a]pyrimidinones: Precursors for Pyridyl- and Thiazolyliminopropadienones, R - N=C=C=C=O

2012 ◽  
Vol 65 (2) ◽  
pp. 105 ◽  
Author(s):  
Heidi Gade Andersen ◽  
Curt Wentrup
Keyword(s):  
Ir Spectroscopy ◽  
Room Temperature ◽  
Major Product ◽  
Starting Material ◽  
Open Chain ◽  
Dihydro Derivative ◽  
Analogous Manner ◽  
Matrix Ir Spectroscopy

2-Pyridyliminopropadienone 6 is formed together with 2-aminopyridine on flash vacuum thermolysis (FVT) of 2-pyridylamino-pyridopyrimidinone 16a and observed by Ar matrix IR spectroscopy, but the two products recombine on warming to room temperature to regenerate the starting material. FVT of the picolinylamino-pyridopyrimidinones 16b and 16c generated mixtures of pyridyliminopropadienone 6 and picolinyliminopropadienones 19b and 19c, respectively. These reactions can be understood in terms of fragmentation of the open-chain bis(2-pyridylamino)methyleneketene intermediates 20 or the thermal interconversion of pyridopyrimidinones 16 and mesoionic pyridopyrimidinium olates 21. 2-Thiazoyliminopropadienone 28 was obtained in an analogous manner by FVT of the 2-(methylthio)thiazolopyrimidinone 24. However, the corresponding dihydro derivative 31 yielded cyanoketene 36 as the major product.

Thioketenes and Iminopropadienethiones RN=C=C=C=S from Isoxazolones

2010 ◽  
Vol 63 (12) ◽  
pp. 1694 ◽  
Author(s):  
David Kvaskoff ◽  
Curt Wentrup
Keyword(s):  
Density Functional Theory ◽  
Ir Spectroscopy ◽  
Density Functional ◽  
Functional Theory ◽  
Thermal Elimination ◽  
Matrix Ir Spectroscopy

Isoxazolones 6 undergo thermal elimination of propene and isopropylthiol to produce thioketenes 7 at 500–600°C under flash vacuum thermolysis conditions. At 700–900°C further fragmentation occurs to produce iminopropadienethiones, RNCCCS 8. In addition, 3-alkylisoxazolones 6d–e rearrange to cyanothioketenes 10d–e. Compounds 7, 8, and 10 were characterized by Ar matrix IR spectroscopy and comparison with density functional theory-calculated spectra. Thioketenes 7 reacted with amines to afford thioamides 11. Reaction of aryliminopropadienethiones 8 with amines caused cyclization to 2-aminoquinoline-4(1H)-thiones 16.

Advances in Use ofp-H2as a Novel Host for Matrix IR Spectroscopy

2010 ◽  
Vol 57 (4B) ◽  
pp. 771-782 ◽  
Author(s):  
Mohammed Bahou ◽  
Chiung-Wei Huang ◽  
Ya-Ling Huang ◽  
Joerg Glatthaar ◽  
Yuan-Pern Lee
Keyword(s):  
Ir Spectroscopy ◽  
Novel Host ◽  
Matrix Ir Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document