A comment on the dependence of the C-H proton isotropic hyperfine constants on carbon hybridization in planar radicalS

✍ Scribed by Z.B. Maksić; K. Kovacevic

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 435 KB
• Volume: 73
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(80)80725-1

✦ Synopsis

Properties of the

McConnell QCH parameter relating proton lsotroplc hyperfiie coupbng constants to spin densities m pIanar rmg radxals are examined. QCH LS a senslhve funtion of the hybrihtion of the C-H bond attached to rachcai carbocycles C,,H, (n = 3,5,6,7,8). The hybrldlzatlon effect is most pronounced m the highly stramed cyclopropenyl raduxd. Q~-H spans a narrow range m most of the common r-radicals, mcludmg moderately stramed fused systems bke azulene, bl--__ phenylene, acenaphthylene and acepleladylene amons.