[(PPh
3)
2N][Au(acac)
2](acac = acetylacetonate) reacts with terminal alkynes RC
CHtogive [(PPh
3)
2N][Au(C
CR)
2] (R= H,
tBu, SiMe
3, CH
2X (X =Cl, Br, OH)) complexes. Thereactions between[(PPh
3)
2N][Au(C
CH)
2]and [(PPh
3)
2N][AuX
2] (X= Cl, Br, I) give[(PPh
3)
2N][Au(C
CH)X]complexes. Neutral mononuclear[Au(C
CR)(NHEt
2)] (R =SiMe
3,
tBu), [Au(C
CR)(PR'
3)] (R= H, R' = Ph, C
6H
4OMe-4; R =CH
2Cl, CH
2Br, CH
2OH,R' = Cy= cyclohexyl; R = SiMe
3, R' = Ph,C
6H
4OMe-4, Cy; R =
tBu,R' = Ph, Cy, C
6H
4OMe-4),[Au(C
CR)(CN
tBu)] (R =SiMe
3,
tBu), and[Au(C
CR){C(NH
tBu)(NEt
2)}](R = H, SiMe
3,
tBu) or dinuclear[(AuL)
2{
-C
C(CH
2)
5C
C}](L = PPh
3, CN
tBu,C(NH
tBu)(NEt
2)) areobtained via a variety of synthetic methods: (i) reaction between[(PPh
3)
2N][Au(C
CH)
2]and [Au(PR
3)
2]ClO
4,(ii) reaction of terminal alkynes with [Au(acac)(L)], (iii)reaction of[AuClL] complexes with terminal alkynes in diethylamine, (iv)substitution reactions (
e.g.,[Au(C
CR)(NHEt
2)] + PR'
3), (v)reaction of diethylamine with alkynyl isocyanidederivativesto give alkynylcarbene complexes. The crystal structures of[(PPh
3)
2N][Au(C
CCH
2OH)
2],[Au(C
CSiMe
3)(CN
tBu)], and[Au(C
CR)(PR'
3)] (R' = Cy, R =CH
2Cl, CH
2Br; R' = Ph, R=SiMe
3,
tBu) were determined.