Novel topologies in NiII cluster chemistry:: Incorporation of alkaline-earth metals in the new [NiII6MgII2] and [NiII8MII] (M = Sr, Ba) cages

被引：21

作者：

Aromí, G

Roubeau, O

Helliwell, M

Teat, SJ

Winpenny, REP

机构：

[1] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

[2] Ctr Rech Paul Pascal, F-33600 Pessac, France

[3] CCLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

DALTON TRANSACTIONS | 2003年 / 17期

关键词：

D O I：

10.1039/b304713j

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of the complex [Ni-2(H2O)(piv)(4)(Hpiv)(4)] (1) (Hpiv = pivalic acid) with Hppo (3-phenylpyrazolin-5-one) in the presence of a base of an alkaline-earth metal (M-II = Mg-II, Sr-II or Ba-II) has led to three different Ni-II clusters whose structures are controlled by the nature of M-II. The formulae of the new heteronuclear cages are [Ni6Mg2(OH)(2)(ppo)(4)(piv)(10)(Hppo)(4)(MeOH)(2)](2), [Ni8Sr(OH)(2)(ppo)(6)(piv)(10)(Hppo)(5)(Hpiv)(2)(MeCN)] (3) and [Ni8Ba(OH)(2)(ppo)(6)(piv)(10)(Hppo)(5.3)(Hpiv)(0.7)(MeCN)(2)] (4). Magnetic measurements indicate that the spin ground state of 2 consists of two independent S = 3 units, while the presence of two non-interacting S = 2 fragments in the molecule is postulated for compounds 3 and 4.

引用

页码：3436 / 3442

页数：7

共 43 条

[1] SYNTHESIS, STRUCTURE, AND SPECTROSCOPIC PROPERTIES OF COPPER(II) COMPOUNDS CONTAINING NITROGEN SULFUR DONOR LIGANDS - THE CRYSTAL AND MOLECULAR-STRUCTURE OF AQUA[1,7-BIS(N-METHYLBENZIMIDAZOL-2'-YL)-2,6-DITHIAHEPTANE]COPPER(II) PERCHLORATE [J].