ChemInform Abstract: SYNTHESIS AND STRUCTURE OF (2.2)(2,7)PYRENOPHANE

Irngartinger, Hermann; Kirrstetter, R. G. H.; Krieger, C.; Rodewald, H.; Staab, Heinz A.

doi:10.1002/chin.197732215

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“…However, the smaller red shift in the anti-[2.21 (2,7) fluorenophane 4b as compared to the syn-isomer 4a can at least be explained qualitatively by the fact that in the former the various C atoms are not situated in pairs directly opposite to each other as shown in fig. 3 [7]. We shall outline the reasons for this behaviour in some more detail for the analogous situation for the ph9sphorescence from the triplet state and not here in order to avoid repetition since the arguments are the same.…”

Section: Resultsmentioning

confidence: 95%

“…3 the results of an X-ray structure analysis of 4b which has recently been completed [7]. Similar .. z· 'n n-octane considerations on the relations between spectroscopic properties and structural parameters of [2.2] phanes as outlined in the subsequent paper [9].…”

Section: Resultsmentioning

confidence: 99%

“…H·P"i\I'-..r'"tt"J 6 5 , J J. (2,7) fluorenophane (anti) 4b. Numbering of atoms in phanes analogous to monomers.…”

Section: Resultsmentioning

confidence: 99%

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Transanular interaction in [2.2]phanes: [2.2](4,4′)Diphenylophane and [2.2](2,7) fluorenophane

Schweitzer¹,

Hausser²,

Haenel

1978

Chemical Physics

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The emission spectra and the zero field splitting parameters D and E of the first excited triplet states of [2.21 (4,4') diphenylophane 3 and of the two stereoisomeric syn-and anti [2.2] (2,7) fluorenophanes 4a and 4b are investigated and compared with those of the corresponding monomers. The results are interpreted in terms of the total intersystem bond density df between the two subunits which is the sum over the bond densities dl! between the 2pz-atomic orbitals of the various aromatic C atoms i,j of the two subunits (df = '£i,jdl!). I. Experimental resultsI_n several preceding papers we have studied the transanular 7r·electron interaction in a number of [2.2} phanes including several isomeric naphthalenophanes, phenanthrenophane and pyrenophane [1][2][3].In this paper we report on the emission spectra and the zero field splitting parameters D and E of the first excited triplet states of the monomers 4,4'-dimethyldiphenyl 1 and 2,7-dimethylfluorene 2 as well as on those of the corresponding [2.21 phanes, i.e.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%