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Fig.1$B!!(BEI/MS of TMS-long chain base(d18:1)


$B!!(BFig.1$B$K(Bd18:1LCB$B$N(B EI/MS$B$r<($7$?!#DL>o!"J,;R%$%*%s!J(BM+$B!&(B$B!K$O8!=P$5$l$J$$$G!"(Bm/z 428$B$K(B[M-15]+$B%$%*%s!J(BTMS$B4p$h$j%a%A%k%i%8%+%k$NC&N%!K!"(Bm/z 340$B$K(B[M-103]+$B%$%*%s!JJ,;R%$%*%s$h$j(B CH2OTMS$B%i%8%+%k$NC&N%!K!"(Bm/z 338$B$K(B[M-15-90]+$B%$%*%s!J%a%A%k%i%8%+%k!\(BTMS-OH$B!J(BTMS$B4p$H?e;@4p$K$h$kCf@-J,;R!K$NC&N%!K$,8=$l$k$N$G!"$3$l$i$N%$%*%s$h$j!"$=$N(B LCB$B$NJ,;RNL$,7h$^$k!#$=$7$F(B LCB$B$N(BTMS$BM6F3BNFCM-$N%Y!<%9%T!<%/%$%*%s$G$"$k(B m/z 132$B!J(B[H2NCHCH2OTMS]+$B!K$N%$%*%s$,8=$l$k$N$G(B LCB$B$G$"$k$3$H$r3NG'$9$k!#(B
$B!!$3$N(B GC/EI/MS$BK!$O(B LCB$B$rJ,@O$9$k:]!":G$b$h$/MQ$$$i$l$kJ}K!$G$"$k$,!"(BEI/MS$B$K$*$1$k(B LCB$B$N(BTMS$BM6F3BN$N%U%i%0%a%s%F!<%7%g%s$K$D$$$F!">\:Y$K8!F$$5$l$?8&5fJs9p$OHs>o$K>/$J$$(B$B#1(B$B!A(B$B#3(B$B!K(B$B!#Cx$B#4(B$B!K(B$B$K$*$$$F!"(BLCB$B$N(BTMS$BM6F3BN$N%U%i%0%a%s%F!<%7%g%s$K$D$$$F%j%s%/Av::K!$K$h$j8!F$$7!"(BLCB$B$N(BTMS$BM6F3BNFCM-$N%Y!<%9%T!<%/%$%*%s$G$"$k(B m/z132$B$N%$%*%s$d(B [M-103]+$B%$%*%s$N%U%i%0%a%s%F!<%7%g%s$rM=B,$7!"(B[M-15]+$B%$%*%s$r%W%j%+!<%5!<%$%*%s$H$7$F(B [M-15-90]+$B%$%*%s$,@8@.$9$k%U%i%0%a%s%F!<%7%g%s$,$"$k$3$H$r3NG'$7$?!#$7$+$7!"(B[M-15]+$B%$%*%s$d(B [M-15-90]+$B%$%*%s$,!"#10L$^$?$O#30L$NC:AG$N$I$A$i$N?e;@4p$K7k9g$7$?(B TMS$B4p$h$jC&N%$7$F@8@.$9$k%$%*%s$G$"$k$+$OM=B,$G$-$J$+$C$?!#(B
$B!!:#2s!"Cx+$B!"(B[M-15-90]+$B%$%*%s$K$D$$$F!"(BMOPAC$B$N(B AM1$BK!$rMQ$$$FJ,;R50F;!J(BMO$B!K7W;;$r9T$$!"3F%$%*%s$N@8@.G.!J"$(BH$B#f(B$B!K$H0BDj9=B$$r;;=P$7$?!#$=$7$F5a$a$i$l$?%$%*%s$N0BDj9=B$$H"$(BH$B#f(B$B$h$j!"(BLCB$B$N(B TMS$BM6F3BN$NJ,;R%$%*%s$+$i(B [M-15]+$B!"(B[M-15-90]+$B$N%$%*%s$,@8@.$9$k%U%i%0%a%s%F!<%7%g%s$K$D$$$FM=B,$r9T$C$?!#$^$?%Y!<%9%T!<%/$H$J$j!"(BLCB$B$G$"$k$3$H$N3NG'$KI,?\$G!"Bg@Z$J%$%*%s$G$"$k(B m/z 132$B$N%$%*%s9=B$$K$D$$$F$bM=B,$r9T$C$?!#(B

$B-6!%(BLCB$B$N(BGC/EI/MS

$B!!(Bd18:1LCB$B$O3-(B$B#5(B$B!K(B$B$N%9%U%#%s%4;i$N%9%U%#%s%4;i$B#6(B$B!K(B$B$K$h$jD4@=$7$?!##O(B-TMS$B2=$O(BLCB$BLs(B 0.5 mg$B$r%T%j%8%s(B 0.5 dm-3$B$KMO$+$7!"%X%-%5%a%A%k%8%7%i%6%s(B 0.1 dm-3$B!"%H%j%a%A%k%/%m%m%7%i%s(B 0.05 dm-3$B$r2C$(!":.9g$7$?8e!"(B65 $B!n$G(B5$BJ,4V2CG.$7$?!#F@$i$l$?(BTMS$BM6F3BN$O(BGC-MS$B$GJ,@O$7$?!#AuCV$OF|K\EE;R(BJMS-HX 100 $B $B-7!%NL;R2=3XE*7W;;(B

$B!!7W;;$r9T$&$?$a$N(B d18:1LCB$B$N(B TMS$BM6F3BN$NF~NO9=B$$O(B CONFLEX$B%W%m%0%i%`(B$B#7(B$B!K(B$B$rMQ$$$F:G>.%(%M%k%.!$B#8(B$B!$(B$B#9(B$B!K(B$B7W;;$r9T$&;v$K$h$j5a$a$i$l$?9=B$$r=i4|F~NO9=B$$H$7$?!#(B
$B!!(BM+$B!&(B$B!J(Bm/z 443$B!K!"(B[M-15]+$B!J(Bm/z 428$B!K!"(B[M-15-90]+$B!J(Bm/z 338$B!K%$%*%s$N7W;;$K$O(BMOPAC Ver6$B#1#0(B$B!A(B$B#1#3(B$B!K(B$B$N(BAM1$BK!$r;HMQ$7$?!#(BM+$B!&(B$B$N"$(BH$B#f(B$B$N7W;;$O!"$^$:%$%*%s2=$5$l$F$$$J$$J,;R$K$D$$$F(BAM1$BK!$G7W;;$r9T$$!"5a$a$i$l$?"$(BH$B#f(B$B$H%$%*%s2=%(%M%k%.!$B#1#4(B$B!K(B$B$KEv$F$O$a$F5a$a$?!#(B

$B!!!J(B1$B!K!!"$(BH$B#f(B$B!J(BM+$B!&(B$B!K!a"$(BH$B#f(B$B!J(BM$B!K!\(BIE$B!J(BM$B!K(B

$B!!(B[M-15]+$B!"(B[M-15-90]+$B%$%*%s$N7W;;$O5a$a$i$l$?(B M+$B!&(B$B$N9=B$$h$j!"$=$l$>$l$N#10L$^$?$O#30L$NC:AG$N?e;@4p$K7k9g$7$F$$$k(B TMS$B4p$h$j%a%A%k4p(B1$B$D$r=|$$$?9=B$!J(B[M-15]+$B!K!"(B TMS-OH$B$r(B 1$B$D=|$$$?9=B$(B([M-15-90]+)$B$r:n@.$7!"%-!<%o!<%I$K(B CHARGE=1$B$r;XDj$7$F7W;;$r9T$C$?!#(B $B!!(Bm/z 132$B$N%$%*%s$N7W;;$O#20L$H#30L$NC:AG4V$G3+Nv$7$F@8@.$9$k%$%*%s$N9=B$$r:n@.$7!"%-!<%o!<%I$K(B CHARGE=1$B$r;XDj$7$F7W;;$r9T$C$?!#(B
$B!!$3$l$i$N%$%*%s9=B$$N(B MO$B7W;;$r9T$&:]!"$=$NB>$N%-!<%o!<%I$O(B AM1, VECT, BONDS, PRECISE, EF, GNORM=0.01, T=12H $B$J$I$r;XDj$7$?!#(B
$B!!F~NO9=B$$N:n@.$*$h$S(B MO$B7W;;$K$h$C$F5a$a$i$l$?0BDj9=B$$N%\!<%k%"%s%I%9%F%C%/%b%G%k$NI=<($K$O(B Free Wheel for MS-Windows$B#1#5(B$B!K(B$B$rMQ$$$?!#(B

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$B#1!%(B[M-15]+$B!"(B[M-15-90]+$B$N%$%*%s$,@8@.$9$k%U%i%0%a%s%F!<%7%g%s$K$D$$$F(B
$B!!$^$:(B 1$B0L$N?e;@4p$K7k9g$7$F$$$k(BTMS$B4p$+$i%a%A%k%i%8%+%k$,C&N%$7!"B3$$$F#30L$N(BTMS$B4p$,?e;@4p!J?eAG$O#20L$NC:AG$h$jE>0\!K$rH<$C$FCf@-J,;R$H$7$FC&N%$9$k$N$r#a%k!<%H!"#30L$N(BTMS$B4p$+$i%a%A%k%i%8%+%k$,C&N%$7!"#10L$N(BTMS$B4p$,?e;@4p!J?eAG$O#20L$NC:AG$h$jE>0\!K$rH<$C$FC&N%$9$k$N$r#b%k!<%H$H$7$?!#(B
$B!!(BFig.2$B$K#a%k!<%H$*$h$S#b%k!<%H$N$=$l$>$l$N%$%*%s$K$D$$$F!"(BMOPAC$B$N(BAM1$BK!$K$h$j7W;;$7$?%$%*%s9=B$$r%\!<%k%"%s%I%9%F%#%C%/%b%G%k$GI=$7!"(BTable $B#1(B$B$K3F%$%*%s$N"$(BH$B#f(B$B$NCM$r<($7$?!#(B


Fig.2 Fragmentation pathways of TMS-long chain base.

              Table 1  Heat of formation of fragment ions (kJ/mol)

$B!!!!!!(B        $B(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(B              
$B!!!!(B           $B%k!<%H(B    $BJ,;R%$%*%s!!(B [M-15]+$B!!!!!!(B[M-15-90]+      
              $B(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(B              
              $B!!(B $B#a(B     $B!]#2#8#0!!(B $B!!!]#5#7#8!!!!(B $B!!!]#8#0(B         
              $B(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(B              
              $B!!(B $B#b(B     $B!]#2#8#0(B     $B!]#5#8#4(B       $B!]#3#9!!!!!!(B   
              $B(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(!(B              
$B!!$=$N7k2L!"(B[M-15]+$B%$%*%s$K$D$$$F$O!"#a!"#bN>%k!<%H$H$b!"(BTMS$B4p$+$i%a%A%k%i%8%+%k$,C&N%$9$k$@$1$G$O$J$/!"(BFig.2$B$N(B[M-15]+$B%$%*%s$N9=B$$K$b<($9$h$&$K!"C&N%8e$N%8%a%A%k%1%$AG$H(B 2$B0L$N%"%_%N4p$NCbAG$H$N4V$K4D>u9=B$$r7A@.$9$k%$%*%s(B $B#a!]#1!"#b!]#1$,:G0BDj9=B$$H$J$C$?!#(B[M-15-90]+$B%$%*%s$K$D$$$F$b!"#a!]#1!"#b!]#1$N(B[M-15]+$B%$%*%s$N4D>u9=B$$rJ]$C$?$^$^!"(BTMSOH$B$,C&N%$7$?(B $B#a!]#2!"#b!]#2$N%$%*%s9=B$$,0BDj9=B$$H$J$C$?!#(B
$B$h$C$F(B MOPAC$B$N(BAM1$BK!$K$h$j;;=P$5$l$?"$(BH$B#f(B$B$rHf3S$7$?7k2L!"J,;RNL$N7hDj$KI,MW$J%$%*%s$G$"$k(B [M-15]+$B$d(B[M-15-90]+$B$N%U%i%0%a%s%H%$%*%s$N%U%i%0%a%s%F!<%7%g%s$O!"#a%k!<%H$NDL$C$F@8@.$9$k(B $B#a!]#2$N(B[M-15-90]+$B%$%*%s$NJ}$,"$(BH$B#f(B$B$,>.$5$$$3$H$+$i!"$^$:#10L$N?e;@4p$K7k9g$7$F$$$k(B TMS$B4p$h$j%a%A%k%i%8%+%k$,C&N%$7$F(B $B#a!]#1$N(B[M-15]+$B%$%*%s$r@8@.$7!"B3$$$F#30L$N?e;@4p$h$j(B TMS-OH$B$,C&N%$7$F(B $B#a!]#2$N(B[M-15-90]+$B%$%*%s$,@8@.$9$k$H?dB,$5$l$?!#(B


Fig.3 structure of c-1

$B!!$^$?(B $B#a%k!<%H$K$*$$$F!"#10L$K7k9g$7$F$$$k(B TMS$B4p$+$i%a%A%k%i%8%+%k$,C&N%$9$k:]$K(B Fig.3$B$N(B $B#c!]#1$N$h$&$J4D>u9=B$$K$J$i$J$$(B [M-15]+$B%$%*%s!J"$(BH$B#f(B= -410 kJ/mol$B!K9=B$$bF@$i$l$?$,!"#a%k!<%H$N4D>u9=B$$N(B[M-15]+$B%$%*%s!J#a!]#1!$"$(BH$B#f(B= -578 kJ/mol$B!K$KHf$Y$F"$(BH$B#f(B$B$,Bg$-$$$N$G!"$3$N%$%*%s9=B$$O$H$j$K$/$$$H?dB,$5$l$?!#$=$7$F!"$3$N(B $B#c!]#1%$%*%s$K$D$$$F$b#30L$N?e;@4p$K7k9g$7$F$$$k(BTMS$B4p$,(BTMS-OH$B$H$7$FC&N%$9$k$H(B $B#a%k!<%H$N(B[M-15-90]+$B%$%*%s$HF1$84D>u9=B$$N(B $B#a!]#1%$%*%s$H$J$j!""$(BH$B#f(B$B$bF1$8CM$H$J$k$3$H$,(B MO$B7W;;7k2L$+$i<($5$l$?!#(B
$B!!$3$l$i$N(B MO$B7W;;$K$h$C$FF@$i$l$?7k2L$O!"(BSweeley$B$i$,J,@O$7$?(B LCB$B$N(B N-$B%"%;%A%k(B-$B#O(B-TMS$BM6F3BN(B$B#3(B$B!K(B$B$N(B M+$B!&(B$B$+$i(B [M-15]+$B%$%*%s$,@8@.$9$k%U%i%0%a%s%F!<%7%g%s$K$*$$$F!"#10L$N?e;@4p$K7k9g$7$F$$$k(B TMS$B4p$+$i%a%A%k%i%8%+%k$,C&N%$9$k>l9g$H#30L$N?e;@4p$K7k9g$7$F$$$k(B TMS$B4p$+$iC&N%$9$k>l9g$N(B 2$B$D$N?dDj%$%*%s9=B$$KBP$7$F$bE,1~$G$-$k$H9M$($i$l!"(BTMS$B4p$r(B 2$B$D0J>e;}$D2=9gJ*$N(B EI/MS$B$K$*$1$k%U%i%0%a%s%F!<%7%g%s$NM=B,$K9-$/MxMQ$G$-$k$H9M$($i$l$?!#!!(B

$B#2!%%Y!<%9%T!<%/(B m/z 132$B$N%$%*%s9=B$$K$D$$$F(B
$B!!(BFig.4$B$K(B MOPAC$B$N(BAM1$BK!$K$h$j7W;;$7$?(B m/z132$B$N%$%*%s9=B$$r%\!<%k%"%s%I%9%F%#%C%/%b%G%k$G<($7$?!#(B


Fig.4 structure of m/z 132

$B!!4D>u9=B$$r$H$i$J$$(B m/z 132$B$N%$%*%s$N(B MO$B7W;;$r9T$C$?>l9g!"(BFig.4$B$K<($99=B$$,:G0BDj9=B$$G$"$j!""$(BH$B#f(B$B$O(B 233 kJ/mol$B$H$J$C$?!#9=B$>e$NFCD'$H$7$F$O#10L$NC:AG!J(BC1$B!K$N?e;@4p!J;@AG(B, O$B!K$K7k9g$7$F$$$k(BTMS$B4p$N%1%$AG!J(BSi$B!K$+$i#20L$NC:AG!J(BC2$B!K$K7k9g$7$F$$$kCbAG!J(BN$B!K$^$G$N(B 5$B$D$N=E86;R$O$9$Y$FJ?LL>e$K0LCV$7!"(BO$B$H(BN$B$N4X78$O(Bz-$BG[CV$H$J$C$?!#$^$?!"(BC1-C2-N$B$N3QEY$O(B124.2$B!,!"(BO-C1-C2$B$N3QEY$O(B110.1$B!,!"(BSi-O-C1$B$N3QEY$O(B115.8$B!,$G$"$C$?!#$3$N%$%*%s$O(B LCB$B$N(BTMS$BM6F3BN$N(B EI/MS$B$G$O%Y!]%9%T!<%/$H$J$k:G$bFCD'E*$J%U%i%0%a%s%H%$%*%s$G$"$k$K$b$+$+$o$i$:!"#20L$H#30L$NC:AG4V$G3+Nv$7$F@8@.$9$kJ?LL$N%$%*%s9=B$!J(B[H2NCHCH2OTMS]$B!\!K$,<($5$l$k$@$1$G#3$N(BLCB$B$N%U%i%0%a%s%F!<%7%g%s$d%U%i%0%a%s%H%$%*%s$N2r@O$KMxMQ$G$-$k$b$N$H9M$($i$l$k!#(B

$B-8!%Am3g(B

$B!!(BMO$B7W;;$K$h$j!"(BLCB$B$N(B TMS$BM6F3BN$N(B EI/MS$B$K$*$$$F!"J,;RNL$N7hDj$KI,MW$J(B [M-15]+$B!"(B[M-15-90]+$B$N%$%*%s$,@8@.$9$k%U%i%0%a%s%F!<%7%g%s$K$D$$$FM=B,$7$?!#$=$N7k2L!"(B1$B0L$N?e;@4p$K7k9g$7$?(BTMS$B4p$+$i%a%A%k%i%8%+%k$,C&N%$7$F(B[M-15]+$B$N%$%*%s$,@8@.$7!"$D$$$G3F%U%i%0%a%s%H%$%*%s$,@8@.$9$k$3$H$,$o$+$C$?!#$^$?%Y!<%9%T!<%/$H$J$j!"(BLCB$B$G$"$k$3$H$N3NG'$KI,?\$G!"Bg@Z$J(B m/z 132$B$N%$%*%s9=B$$K$D$$$F$b(BMO$B7W;;$K$h$C$F?dDj$7$?!#(B

$B $B!!(BCONFLEX$B%W%m%0%i%`$N;HMQ$K$"$?$C$FElKLBg3XH?1~2=3X8&5f=j$N8eF#?N;V@h@8$K8f65 $BJ8!!8%(B

1) K.-A.Karlsson, Acta Chem. Scand., 19, 294(1965)
2) R.C.Gaver, C.C.Sweeley, J. Am. Chem. Soc., 88, 3643(1966)
3) K.Krisnangkura, C.C,Sweeley, Chem. Phys. Lipids, 13, 415(1974)
4) T.Matsubara, A.Hayashi, J. Chromatogr., 562, 119(1991)
5) $B4_:,=(44$B!$(B977(1995)
6) R.C.Gaver, C.C.Sweeley, J. Am. Oil Chem. Soc., 42, 294(1965)
7) CONFLEX Ver.3.20, JCPE P055 and QCPE #592
8) MM2(77), JCPE P001 and QCPE #395
9) N.L.Allinger, J. Am. Chem. Soc., 99, 8127(1977)
10) MOPAC Ver.6.0 (QCPE No.455)
11) T.Hirano, JCPE Newsletter$B!$(B$B#1(B, 36(1989)
12) J.Toyoda, MOPAC Ver.6.02 for OS/2, (NEC PC-9801)
13) $BJ?Ln91IW!$EDJUOB=SJT!$!HJ,;R50F;K!(BMOPAC$B%,%$%I%V%C%/(B-2$BD{HG(B-$B!I!$(B $B!!(B $B3$J8F2(B (1994)
14) $BCfED>0CKCx!$!HM-5!%^%9%9%Z%/%H%m%a%H%j! 15) $B^<>e9b@5!$J,;R@_7W$NM'!V(BFree Wheel for MS-Windows Ver.0.57D$B!W(B (1996), NIFTY-Serve FCHEM Lib 5 $B!!(B
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