Bulletin of the Korean Chemical Society

  • 제14권1호
  • /
  • Pages.113-117
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  • 1993
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  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지
DOI QR코드

DOI QR Code

New Transition Metal Mediated Alkylation Reaction of arachno-$S_{2}B_{7}H_{8}$, Insertion Reaction of arachno-$S_{2}B_{7}H_{8}^{-}$ with $(CO)_{5}M$ {${C(R_{1})(R_{2})}$} $(M=Cr,\;W;\;R_{1}=CH_{3},\;C_{6}H_{5};\;R_{2}=OCH_{3},\;SC_{6}H{5})$: Synthesis and Characterization of arachno-$4-RCH_{2}-6,8-S_{2}B_{7}H_{8}\;(R=CH_{3},\;IIa;\;C_{6}H_{5},\;IIb)$

  • Hee-Joo Jeon (Department of Chemistry, College of Natural Sciences, Korea University) ;
  • Jae-Jung Ko (Department of Chemicla Education, Korea National University of Education) ;
  • Kang-bong Lee (Korea Institute of Science and Technollogy) ;
  • Sang Ook Kang (Department of Chemistry, College of Natural Sciences, Korea University)
  • 발행 : 1993.02.20
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초록

Good yield synthetic routes for the production of new B-alkyl-dithiaborane clusters are reported. The syntheses of the B-alkyl-dithiaboranes are based on the use of Fischer-type carbene reagents to activate the B-H bonds of dithiaborane for alkyl-addition reactions and are the first examples of transition-mediated reactions of dithiaborane to be reported. Thus, reactions employing arachno-$S_2B_7H_8$- and $(CO)_5M{C(R_1)R_2}$ (M = Cr, W; $R_1 = CH_3,\;C_6H_5;\; R_2 = OCH_3,\;SC_6H_5)$ were found to yield the intermidiate anions I, $[(CO)_5M{C(R_1)R_2S_2B_7H_8}]^-$, which upon protonation gave the corresponding neutral, air-sensitive cluster arachno-4-$RCH_2-6,8-S_2B_7H_8(R=CH_3,\;IIa;\;C_6H_5,\;IIb)$ range from 30 to 35% yield. Complexes IIa and IIb are isoelectronic with arachno-6,8-$S_2B_7H_9$ and, on the basis of the spectroscopic data, are proposed to adopt a similar arachno cage geometry in which an $RCH_2$ units are substituted to 4 position boron atom of the arachno-6,8-$S_2B_7H_9$.

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