The Solid‐State Structures of Dimethylzinc and Diethylzinc

Abstract

Good things come to those who wait: More than 160 years after their discovery, we have determined the solid‐state structures of the classic organometallic compounds dimethylzinc and diethylzinc by using X‐ray crystallography and density functional theory. The study shows that the linear molecules form weak intermolecular interactions with small covalent contributions. Me2Zn undergoes a solid–solid phase transition at 180 K (see picture).

Unexpected Migratory Insertion Reactions of M(alkyl)2 (M=Zn, Cd) and Diamidocarbenes

“…As shown in Figure 1 (14)8) bound to a single ethyl group (ZnÀC 1.998(4) ; [12] c.f. 1.948 (5) in ZnEt 2 ) [13] and an sp 3 -hybridised carbon (ZnÀC DAC-Et 2.059(4) ; N(1)-C(1)-N (2) 109.6(3)8; c.f. 127.72(18)8 in 1) [6] formed via the migratory insertion process.…”

Ultra thin transition metal oxide coatings on diamond for thermionic applications

“…As an illustration, the calculated C-C, C-O, C-Zn and O-Zn bond lengths are listed in Table I and II. The calculated average Zn-O bond length (2.00Å) is found to be very close to the average bond length of 1.97Å in bulk ZnO [14], whereas the average C-O and C-Zn bond lengths are 2.11 and 1.35Å, around 10% shorter than 1.92 and 1.49Å of dimethylzinc and pure oxygenated diamond surface, respectively [12,15]. Although in some cases, due to strain effects, the change in C-C dimer bond length is bigger than 15%, for the correct stoichiometries of investigated TMOs, the 2 × 1 reconstruction is retained.…”

Heterobimetallic metallation studies of N,N-dimethylphenylethylamine (DMPEA): benzylic C–H bond cleavage/dimethylamino capture or intact DMPEA complex

“…The bridging Me group, the carbon atom of which (C11) Comparing the Li1-C11 bond length in 6 [2.248(4) Å] with the Li-C bond lengths in methyllithium (2.31 ± 0.05 Å) [83][84] highlights that within experimental error the bond lengths are similar, in agreement with the Me group in 6 forming an electron deficient bond to the Li centre. However, when compared with bonds lengths in monomeric Me 2 Zn, [85] the CZn bonds are shorter by 0.133 Å than that of the Zn1-C11 bond in 6, as would be expected given the linearity of Me 2 Zn and the lower coordination number of its zinc centre (i.e., CN = 2 versus 3). Donor-acceptor complex 6 was also analyzed by a combination of 1 H, 13 C and 7 Li NMR spectroscopy in the deuterated arene solvents benzene and toluene, as well as in the aliphatic hydrocarbon cyclohexane.…”