Homoleptic Bis(alkyne)platinum(0) compounds containing either NH2- or NH2-/OH-substituents are formed by reaction of Pt(cod)(2) with alkynes as stable compounds. They can be used as variable building blocks for supramolecular networks. The crystal structure analyses of Bis(2-amino-2,5-dimethyl-5-hydroxy-hex-3-yne)platinum(0) (1) and of Bis(l(3-amino-3-methyl-but-l-inyl)-cyclohexane-l-ol)platinum(0) (2) exhibit that the low-valent Pt atom is tetrahedrally surrounded by the four sp-hybridizated carbonatoms of the alkynes. Despite the fact that the bond lengths and -angles of the PtC4 units are equal, the supramolecular structures are different. While in 1 polymer strands are formed in which the bis(alkyne)-Pt-0 units are connected by (OH)(2)(NH2)(2)- tetrahedrons, 2 yields only a dimer containing a network of four OH- and two NH2-groups. Platinum(0) complexes with cationic alkynes bearing ammonium substituents can be isolated as thermal stable compounds. The X-ray structures of [C(FH+)Pt(cod)](4) (8) reveals that four molecular units form a cube with both four NH3+ groups and Cl- at the corners connected by hydrogen bridges. In the bis(alkyne)Pt-0 complex [Cl-1.5(FH+)(1.5)(F)(0.5)Pt] (9) only 1.33 of two NH2 groups are protonated and a hydrogen bridged network connects four bis(alkyne)Pt-0 units (cod: cycloocta-1.5-diene, F: 1-(trimethylsilylethinyl)-1-amino-cyclohexane).
WAGNER, E. R.;MATTHEWS, D. P., J. HETEROCYCL. CHEM., 1984, 21, N 5, 1289-1291
作者:WAGNER, E. R.、MATTHEWS, D. P.
DOI:——
日期:——
Wagner, E. R.; Matthews, D. P., Journal of Heterocyclic Chemistry, 1984, vol. 21, p. 1289 - 1291