the spectroscopic data for ( 4 ) , ( 3) , ( 2 ) , and ( I ) , n = 3 (see Table I). Whilst the approximate agreement of the C-H stretching frequencies and "C-H coupling constants is not surprising and is no argument for or against the existence of conjugative interaction of the cyclopropane rings in
A Simple Synthesis of 1,2-Dihydropentalene and its Substitution Products
β Scribed by Dipl.-Chem. Reinhard Kaiser; Prof. Dr. Klaus Hafner
- Publisher
- John Wiley and Sons
- Year
- 1970
- Tongue
- English
- Weight
- 220 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
To form the radical by oxidation, the substance is shaken with a ten-fold excess of active PbO;! in benzene for 10 min. On rapid removal of the solvent, the reddish-brown solution affords an impure, reddish-brown paramagnetic product.
viscosity the ESR spectrum of ( I ) shows a poorly resolved hyperfine structure (six lines), which we ascribe to a diradical whose exchange energy J is Large compared with the N coupling constant uN["' ( J $ u N ; 4 2 = 5.5 & 1 G); in addition there is the interaction energy of the electrons with th
application may be in medicine where it might be possible to form three dimensional images of biological structures assuming that the problems associated with the transmission of sound in tissue can be solved. The fact that systems for use in acoustical holography are rapidly becoming all-electroni
1 -Methyl-5-aminopyrazole can be tosylated t o give ( 4 ) , R = CH3, m.p. 188-190Β°C, the structure of which has been substantiated by the characteristic position of its sulfonyl absorption [5] in the infrared and by the synthesis [4] of