Subvalent Compounds Featuring Direct Metal–Metal Bonds: The ZnZn Bond in [Cp*₂Zn₂]

Abstract

Something to zinc about: Subvalent compounds with direct metal–metal bonds have been the focus of interest for many decades. Recently the first synthesis of a molecular compound with a direct ZnZn bond was reported. The synthetic route, although not understood, might lead the way to other interesting compounds featuring direct metal–metal bonds, for example, of Group 2 elements.

Energy analysis of metal–metal bonding in [RM–MR] (M=Zn, Cd, Hg; R=CH3, SiH3, GeH3, C5H5, C5Me5)

“…In 2004, the group of Resa, Carmona, Gutierrraz-Puebla and Monge reported first representative example of compound containing Zn-Zn bond in decamethyldizicocene [(g 5 -C 5 Me 5 )Zn 2 ] [11,12]. The formation of [(g 5 -C 5 Me 5 )Zn 2 ] has been highlighted by Perkin [13] and Schnepf and Himmel [14]. Robinson and coworkers have characterized the second compound with a Zn-Zn bond [R 2 Zn 2 ] {R = [{-(2,6-Pri 2 C 6 H 3 )N(Me)C} 2 CH]) [15].…”

A DFT Study on Dinuclear Metallocenes RMMR [R= (BCO)5, (BNN)5; M = Be, Mg, Ca, Zn, Cd]

“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Experimentally, Wang et al reported the second synthesized compound with a Zn-Zn bond, R*ZnZnR* (R*) [{(2,6-Pr i 2 C 6 H 3 )N(Me)C} 2 CH]). 13 Wu and Stace prepared and studied the fragmentation patterns of M 2 L n + (M ) Zn, Cd; L) pyrrole, furan; n ) 1-5) by combination of a pick-up technique and high-resolution mass spectrometry.…”

A Theoretical Study on Structures, Bonding Energies and Aromaticity of Two New Series of Dinuclear Phosphametallocenes: (η5‐P5)MM′(η5‐P5) and (η5‐C5H5)MM′(η5‐P5) (M, M′ = Zn, Cd)

“…[3] One motivation of the pres- The various dissected bond NICS contributions reveal that the NICS contributions of the metal-ligand bond, the metal-metal bond, and the metal lone pair electrons to the overall aromaticity in the Zn-containing dinuclear phosphametallocenes are different from their counterpart contributions in the Cd-containing dinuclear phosphametallocenes, such difference causes that the overall NICSs of the Zn-containing dinuclear phosphametallocenes are more negative than that of the Cd-containing dinuclear phosphametallocenes. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006) ent study is stimulated by the new synthesis routes [4,5] and theoretical studies on the structures, the bond interactions, [2] and the vibrational signatures of the Zn-Zn stretching mode in the novel molecule. [6] The analogous dinuclear metallocenes, such as CpCu 2 Cp and CpNi 2 Cp, [7] [M 2 (η 5 -Cp X ) 2 ] (M = Zn and Cd, Cp X = C 5 Me 5 and C 5 H 5 ), [8] and the dinuclear cyclopentadienylcobalt carbonyls [9] were investigated.…”