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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 34, Number 4
JKCSEZ 34(4)
August 20, 1990

Title	A Kinetic Study of the Substitution of β-Disketone in Bis(β-diketonato)Oxovanadium (Ⅳ) (베타-디케토네이토) 옥소바나듐 (Ⅳ) 착물에서의 베타-디케톤 치환반응에 관한 속도론적 연구
Author	Kyu-Tak Howang, Jung-Sung Kim, Han-Chul Shin, In-Whan Kim, Gi-Tae Kim 황규탁, 김정성, 신한철, 김인환, 김기태
Keywords
Abstract	비스(아세틸아세토네이토)옥소바나듐(Ⅳ) 착물(VO (acac)2)에서 하나의 아세틸아세톤(acac) 배위자가 디벤조일메탄(dbm)에 의해 치환되는 반응속도를 여러 가지 용매에서 분광광도법으로 측정했다. 반응조건을 [VO (acac)2] 》[Hdbm]으로 했을 때 치환반응의 속도식은 다음과 같다. 속도 = k2K[VO(acac)2] [Hdbm] / (1 ＋ K[VO(acac)2])여기에서 평형상수 K는 [VO (acac)2dbmH] / [VO(acac)2][Hdbm]이며, 반응속도상수 k2는 dbmH착물내에서 Hdbm으로부터 acac-로의 양성자 이동속도에 해당하는 값이다. Kinetic of substitution of dibenzoylmethanate (dbm) for one acetylacetonate (acac) in VO (acac)2 have been studied in various solvents by spectrophotometry. Under the condition [VO (acac)2] 》[Hdbm], the rate law for the substitution reaction is expressed as, rate = k2K[VO(acac)2] [Hdbm] / (1 ＋ K[VO(acac)2]) where K = [VO (acac)2dbmH] / [VO(acac)2][Hdbm] and the rate constant k2 corresponds to that of proton transfer from coordinated Hdbm to leaving acac- in VO(acac)2dbmH.
Page	319 - 324
Full Text	PDF

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