Synthesis of Long, Palladium End-Capped Polyynes through the Use of Asymmetric 1-Iodopolyynes.

Autor:	Pigulski, Bartłomiej, Gulia, Nurbey, Szafert, Sławomir
Předmět:	PALLADIUM compounds POLYYNES ORGANOMETALLIC chemistry X-ray crystallography NUCLEAR magnetic resonance
Zdroj:	Chemistry - A European Journal; Dec2015, Vol. 21 Issue 49, p17769-17778, 10p
Abstrakt:	The synthesis of a unique series of long, asymmetric 1-iodopolyynes ( 1-C nI and 2-C nI) with the sp-hybridized carbon chain up to a decapentayne is reported. These compounds were then used as substrates in reactions with Pd(PPh3)4 leading to another series of palladium end-capped polyynes, which were unstable in solution. Organometallic octatetraynes 1-C8[Pd]I, 2-C8[Pd]I, and decapentayne 1-C10[Pd]I are palladium end-capped polyyne compounds with the longest carbon chains reported so far. All the complexes as well as their organic precursors were fully characterized by NMR, HRMS(ESI), IR, TGA-DTA, and UV/Vis techniques, and the X-ray crystal structures of two silyl-protected precursors and one palladium complex are presented. The synthetic approach for palladium species is envisioned as a general route for the synthesis of labile organometallic polyynes. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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