Synthesis of new heteronuclear complexes with bridging carbyne ligands between tungsten and gold. X-Ray crystal structure of [AuW(µ-CC₆H₄Me-4)(CO)₂(bipy)(C₆F₅)Br]

Abstract

The compound [W(-CR)(CO),(q-C,H,)] ( R = C,H,Me-4) (1) reacts with [Au(C,F,)(tht)] (tht = tetrahydrothiophene) t o give the tungsten-gold complex [AuW(p-CR) (CO),( C, F, ) (q-C,H,)]

Side-on coordination of boryl and borylene complexes to cationic coinage metal fragments

“…It has been observed that ligands in Au(I) complexes that deviate from linear geometry cause the energies of the 5d orbitals to rise, which strengthens the backdonation from the Au(I) center to the ligand (CO). 44 It is interesting to note that the structural differences observed between borylene coordination to coinage metals and other transition metal fragments closely reect those reported for analogous alkylidyne chemistry: when coordinated to Au + , alkylidynes also exhibit larger Mm C-R angles and shorter Mm C bonds than bridging alkylidynes with most other metals, where the m CR vector is closer to perpendicular to the M-Au bond 4,[45][46][47][48][49][50] These ndings further demonstrate the unique bonding characteristics of coinage metals.…”

Cluster Complexes with Bonds Between Transition Elements and Copper, Silver and Gold

“…Table 26 were synthesized via reactions for which the n a t u r e of the p r o d u c t could not be predicted in advance. However, the reagents [Cu(THF)(T)-C 5 Me 5 )] 2 9 0 ' 2 9 2 a n d [Au(SC 4 H 8 )(C 6 F 5 )] 292 ' 302 have been used to introduce C u ( T | -C 5 M e 5 ) a n d Au(C 6 F 5 ) groups, respectively, into n e u t r a l dimeric precursors. V c o ( c m " 1 ) f o r R = P h , 2048 s, 2008 s, 1 9 8 2 s, 1 9 7 …”

π-Bonding of Group 11 Metals to a Tantalum Alkylidyne Alkyl Complex Promotes Unusual Tautomerism to Bis-alkylidene and CO2 to Ketenyl Transformation

“…The π-activation of unsaturated hydrocarbons, such as alkenes, dienes, alkynes, or allenes, via coinage metals is well-established − and led to numerous methodologies and applications, especially in organic chemistry and catalysis. − Coinage metals are also known to efficiently coordinate to a number of heteroelement-based π-systems, − yet practical applications of the latter still remain limited. Despite the interest of metal–carbon triple bonds in organometallic chemistry, − the activation of MC motifs via external d-block metal centers is still in its infancy.…”