An infrared study of the photoisomerization of <i>N</i>-benzylideneaniline

Lewis, James W.; Sándorfy, C.

doi:10.1139/v82-235

Cited by 32 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, in the case of formazans where the 5-phenyl ring is substituted with these groups (1e10) the C]N stretching band occurs at 1520e1530 cm À1 , indicating that the chelate and non-chelate structures are in equilibrium. The C]N stretching band appears at 1565e1551 cm À1 in the case where there is no chelate structure present (excited state) and 1510e 1500 cm À1 in the case of chelation [3,23,25]. Therefore, formazans 11e16 must be extensively present in the chelate structure since the C]N stretching band appears at 1510e 1500 cm À1 .…”

Section: Spectral Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

The synthesis and spectral properties determination of 1,3-substituted phenyl-5-phenylformazans

Tezcan

Uzluk

2007

Dyes and Pigments

View full text Add to dashboard Cite

In this study, novel 1,3-substituted phenyl-5-phenylformazans were synthesized with eNO 2 , eCl, eBr, eCH 3 , eOCH 3 groups in the o-, m-, and p-position of the 1-phenyl ring and eNO 2 , eOCH 3 groups in the m-and p-position of the 3-phenyl ring. Their structures were elucidated by elemental analysis and GCemass and their spectral behaviors were investigated with 1 H NMR, 13 C NMR, IR, UVevis spectra. The absorption characteristics of the compounds were examined by UVevis spectra. There was a shift in l max whose amount was dependent upon the type and position of the substituent on the ring. A linear correlation was obtained between this substituent effect and Hammett substituent coefficients.

show abstract

Section: Spectral Propertiesmentioning

confidence: 99%

“…The formation of hydrogen bond between the eNO 2 and NeH groups. Table 4 UVevis absorption maxima of formazans 1e16 (CH 3 486 nm and acted as electron donating groups due to resonance effect (compounds 7 and 10).…”

Section: Substituent Effect On the Uvevis Absorption L Max Valuesmentioning

confidence: 99%

The synthesis and spectral properties determination of 1,3-substituted phenyl-5-phenylformazans

Tezcan

Uzluk

2007

Dyes and Pigments

View full text Add to dashboard Cite

show abstract

“…Dokić ), resulting in a significantly shorter half-life of the cis isomer of only about 1 s at 25 8C. [17,18] Later, different experimental methods, such as flash photolysis, [18][19][20] NMR spectroscopy, [21,22] UV/Vis spectroscopy [23] and IR spectroscopy, [24] were applied for further studies of this isomerisation process, including substituent [18-21, 23, 25] and solvent effects. [19,20,25] Moreover, for deeper analysis, semi-empirical [complete neglect of differential overlap (CNDO)] molecular orbital, [13,15] ab initio, [20] and density functional calculations [25,26] were performed.…”

Section: Introductionmentioning

confidence: 99%

cis–trans Isomerisation of Substituted Aromatic Imines: A Comparative Experimental and Theoretical Study

et al. 2011

View full text Add to dashboard Cite

The cis-trans isomerisation of N-benzylideneaniline (NBA) and derivatives containing a central C=N bond has been investigated experimentally and theoretically. Eight different NBA molecules in three different solvents were irradiated to enforce a photochemical trans--(hnu)-->cis isomerisation and the kinetics of the thermal backreaction cis--(Δ)-->trans were determined by NMR spectroscopy measurements in the temperature range between 193 and 288 K. Theoretical calculations using density functional theory and Eyring transition-state theory were carried out for 12 different NBA species in the gas phase and three different solvents to compute thermal isomerisation rates of the thermal back reaction. While the computed absolute rates are too large, they reveal and explain experimental trends. Time-dependent density functional theory provides optical spectra for vertical transitions and excitation energy differences between trans and cis forms. Together with isomerisation rates, the latter can be used to identify "optimal switches" with good photochromicity and reasonable thermal stability.

show abstract

“…In the complexes, this band was found at the lower values. The lowering of the νC=N frequency in the complexes, indicates the coordination of the azomethine nitrogen atom at the metallic ion [18][19]. In addition, all IR spectra belonging to the Co (II) ,Ni (II),Cu (II) , Zn (II)and Hg (II) complexes confirming the existence of water molecules in the structure of the crystalline lattice [20].…”

Section: Synthesis Of Complexes(1-5)[17]mentioning

confidence: 99%

Synthesis of [2-(Benzylidene amino)Ethanesulfonic Acid ]

Shaheen¹,

Saied²,

Mahal³

2013

KUJSS

View full text Add to dashboard Cite

Condensation of 2-aminoethane sulfonic acid(Taurine) and benzaldehyde in sodium hydroxide ethanolic solution gave the Schiff base [2-(benzylidene amino) ethanesulfonic acid(L)]. This base particularly bind to metal ions Co (II) ,Ni (II),Cu (II) , Zn (II)and Hg (II) in 2:1 molar ratio via the N atom lone pair and oxygen atom of sulfonic acid (the most active positions) as a neutral bidentate ligand to form complexes of general formula [ML 2. 2H 2 O]Cl 2. Characterization of these complexes were octahedral geometry as information obtained from IR and UV spectra and molar conductivity measurements.

show abstract

An infrared study of the photoisomerization of N-benzylideneaniline

Cited by 32 publications

References 17 publications

The synthesis and spectral properties determination of 1,3-substituted phenyl-5-phenylformazans

The synthesis and spectral properties determination of 1,3-substituted phenyl-5-phenylformazans

cis–trans Isomerisation of Substituted Aromatic Imines: A Comparative Experimental and Theoretical Study

Synthesis of [2-(Benzylidene amino)Ethanesulfonic Acid ]

Contact Info

Product

Resources

About