[n+n]-Heterometallomacrocyclic complexes (n ≥ 2) prepared from platinum(II)-centred ditopic 2,2′:6′,2"-terpyridine ligands:: dimensional cataloguing by pulsed-field gradient spin-echo NMR spectroscopy

被引：12

作者：

Beves, Jonathon E. ^{[1
]}

Constable, Edwin C. ^{[1
]}

Housecroft, Catherine E. ^{[1
]}

Neuburger, Markus ^{[1
]}

Schaffner, Silvia ^{[1
]}

Shardlow, Ellen J. ^{[1
]}

机构：

[1] Univ Basel, Dept Chem, CH-4056 Basel, Switzerland

来源：

DALTON TRANSACTIONS | 2007年 / 16期

关键词：

D O I：

10.1039/b618197j

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of 4'-(2-propyn-1-oxy)-2,2':6',2"-terpyridine (HC equivalent to CCH(2)Oterpy) with trans-[PtI2(PR3)(2)] (R = Et, Bu-n, Ph) results in the regioselective formation of the metalloditopic ligands trans-[Pt(C equivalent to CCH(2)Oterpy)(2)(PR3)(2)], crystallographic data for which are presented. Each ditopic ligand reacts with FeCl2 center dot 4H(2)O to give heterometallomacrocycles, the smallest of which is a [2 + 2] macrocycle, confirmed structurally for R = Et. The NMR spectroscopic data confirm the formation of symmetrical species, i.e. macrocyclic and not polymeric species. The distribution of products has been investigated using pulsed-field gradient spin-echo (PGSE) diffusion NMR spectroscopy, and indicates that the kinetic products from the reactions of 1, 2 or 3 (L) with iron(II) are [FenLn](2n+) with n = 2, 3 or 4. For L = 1 and 2, these mixtures of products convert in solution to the thermodynamically favoured [Fe2L2](4+).

引用

页码：1593 / 1602

页数：10

共 68 条

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