| Abstract
| - [AuCl(SMe2)] reacts with HCCR (R = bpyl = 2,2′-bipyridine-5-yl (1), phtpyl = phenyl-4-(2,2′:6′,2′′-terpyridine-4-yl) (2)) and NEt3 (1:1:3) to afford the polymers [Au(CCR)]n (R = bpyl (3), phtpyl (4)). The new alkyne HCCphccbpyl (5, phccbpyl = 4-C6H4CCbpyl) has been prepared by Sonogashira coupling of 4-Me3SiCCC6H4I and 1 followed by desilylation of the resulting alkyne 4-Me3SiCCphccbpyl. The alkynyl Au(I) complexes [Au(CCR)L] (R = bpyl, L = PPh3 (6), PTol3 (7, Tol = 4-MeC6H4), PEt3 (8); R = phtpyl, L = XyNC (9), PPh3 (10); R = phccbpyl, L = PPh3 (11)) have been prepared by reacting: (1) 3 or 4 with L or (2) the corresponding alkyne 1, 2, or 5 with [Au(acac)(PPh3)] (acac = acetylacetonato). The reaction of 3 or 4 with diphosphines gives [{Au(CCR)}2(μ-Ph2P(CH2)xPPh2)] (R = bpyl, x = 1 (12), 2 (13), 4 (14), 10 (15); R = phtpyl, x = 10 (16)). ESI mass spectrometric studies show that complexes 12-14 are in equilibrium with the salts [Au3(CCbpyl)2(μ-Ph2P(CH2)xPPh2)2][Au(CCbpyl)2], although only when x = 1 (17) was a significant concentration of the salt detected by NMR spectroscopy and isolated. The anionic complexes PPN[Au(CCR)2] (R = bpyl (18), phtpyl (19), or phccbpyl (20)) have been prepared by reaction of the corresponding alkynes with PPN[Au(acac)2]. Complexes 6, 10, 13, 14, 17, and 18 have been characterized by single-crystal X-ray diffraction studies. The alkynyl complexes are luminescent at room temperature, displaying dual emissions.
- A new family of Au(I) alkynyl complexes containing the bipyridine or terpyridine groups has been synthesized. The behavior in solution of some of the complexes, Au···Au and weak hydrogen bond interactions, and photophysical properties of the complexes have been studied.
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