Dinuclear gold(1) complexes of the type [Au2(p-dithiolate)(L)J where L is a phosphine or bis(dialky1phosphine) have been synthesized. The molecular structures of [Au2(p-S(CH2)3S)(p-dppm)] [dppm = bis((diphenylphosphin0)-methane)] (l), [Au&MNT)(PPh3)2] (MNT = 1 ,Zdicyanoethene-1,2-dithiolate-S,S? (2), and [Au2(p-S2C6H4)-(PPh3)2] (3) aredescribed. In addition, the structure ofthe tetranuclear bis(dithio1ate) [ A u~(~( -S~C~H~C H & ( P E~~)~] (4) is reported. Compound 1 exhibits linear S-Au-P coordination and significant metal-metal interaction, Au-Au= 3.128( 1) A. The open-ring complexes 2 and 3contain an irregular three-coordinate gold(1) center and a "normal" two-coordinate, linear gold(1) center in contrast to 1. Compound 4 is a result of [Au(PEt3)]+ coordination to [Au2(pc-S&H3CH3)2l2-. Pertinent crystal data are as follows: Compound 1 crystallized in the monoclinic space group C 2 / c with a = 29.765(9) A, b = 11.479(2) A, c = 18.032(4) A, B = 114.65(1)', and V = 5600(2) A3. Compound 2.Et20 crystallized in the space group P2l/c with a = 17.663(5) A, b = 14.185(3) A, c = 18.780(3) A, j3 = 114.853(18)', and V = 4269(2) A3. Compound 3 crystallized in the space group P21 with 4 = 10.761(4) A, b = 10.687(4) A, c = 16.227(5) A, j3 = 98.82(3)O, and V = 1844(1) A3. Compound 4 crystallized in the space group P21 with a = 9.767(2) A, b = 12.373(3) A, c = 14.096(3) A, j3 = 92.71(2)O, and V = 1707(1) A3.
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