Synthesis and Structure of Ruthenocene-conjugated Microcyclic Triaza Crown Ether

Abstract

Abstract: Protonated N-(ruthenocenylmethyl)-1,4,7-triazacyclononane(1) and N, N′, N″-tris-(ruthenocenylmethyl)-1, 4, 7-triazacyclononane(2) were prepared and characterized. The structure of 2 was determined by X-ray crystallographic method. The crystal belongs to P2₁/a space group and cell parameters are a = 1.4285(3) nm, b = 1.9888(3) nm, c = 1.9133(3) nm; β = 109.12(2)°; V =5.1358(1.0) nm³; Z =4. D_c=1.665 g/cm³. ¹HNMR spectra of 1 and 2 revealed that the absorptions of the protons on substituted Cp rings in these compounds had a down-field shift from those of the protons on the Cp rings of ruthenocene. The observation suggests that the protonated 1,4,7-triazacyclononane has a deshielding effect on the protons of the ruthenocene units. The CV curve of 2 gave an oxidation wave at 0.84 V.

Key words: Ruthenocene, Intramolecular interaction, NMR

CLC Number:

O614.8

TrendMD:

YIN Ye-Gao, YI Chang-Hai, CHEUNG Kung-Kai, WONG Wing-Tak . Synthesis and Structure of Ruthenocene-conjugated Microcyclic Triaza Crown Ether[J]. Chem. J. Chinese Universities, 1999, 20(12): 1838.

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Synthesis and Structure of Ruthenocene-conjugated Microcyclic Triaza Crown Ether

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