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首页> 外文期刊>Chemistry: A European journal >A Systematic Exploration of Nickel-Pyrazolinato Chemistry with Alkali Metals:New Cages From Serendipitous Assembly
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A Systematic Exploration of Nickel-Pyrazolinato Chemistry with Alkali Metals:New Cages From Serendipitous Assembly

机译：碱金属对镍-吡唑啉酮化学的系统探索：偶然组装的新笼子

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The preparation and properties of fourteen novel paramagnetic [Ni_x~II] aggregates bridged by pivalate pyrazoliolate and in most cases hydroxide are reported A rich structural diversity has been achieved by changing the nature of the alkali of the base used durig the synthesis leading to the nuclearities [Ni_4~IINa_4~I] (2,3,4),[Ni~II_5-Na_4~I] (5,6,7) [Ni_5~IILi_6~I] (8) [Ni_8~IIM_2~I] (m=k(9,10),Rb(11,12) Cs(13,14) and [Ni_8~II] (15) All compounds have been characterised by single-crystal X-ray diffraction however full crystallographic details are given only for the representative molecules [Ni_4Na_4-(fpo)_4(piv)_8] (2) [Ni_5Na_4(OH)_2-(mpo)_4(piv)_8(Hpiv)_2(MeCN)_2](5),[nI_5Li_6(OH)_2(fpo)_2(piv)-12(Hpiv)_4] [Ni_8K_2(OH)_4(ppo)_4(piv)_10(Hppo)_2-(Hpiv)_2(MeCN)_2] (9) [Ni_8Rb_2(OH)_4-(ppo)_4(piv)_10 (Hppo)_2(Hpiv)-2(MeCN)_2](11) [Ni_8Cs_2(OH)_4(ppo)_4(piv)_10 (Hppo)_2-(Hpiv)_2(PhCH_2CO_2)_10 (Hmpo)_8] (15) Variable-temperature bulk magnetisation measurement have been performed for each type of complex The [Ni_4~IINa_4~I] clusters show interamolecular antiferromagnetic coupling and a spin ground state of s=0 Complexes of the type [N_5~IINa_4~I] also display antiferromagnetic superexchange leading to an S=1 spin ground state The molecule with nuclearity [Ni_5~IILi_6~I] in contrast wxhibits ferromagetic interactins resulting in the presence of low energy states with high multiplicity and a spinground state S>1 The [Ni_8~IIM_2~I] and [Ni_8~II] clusters is ratonalised in terms of the nature of the Ni-O-Ni angles within the core.
机译：据报道有十四种由新戊酸酯吡唑啉酸酯桥接并在大多数情况下由氢氧化物桥接的新型顺磁性[Ni_x〜II]聚集体的制备和性质。通过改变所用碱的碱性质，获得了丰富的结构多样性。 [Ni_4〜IINa_4〜I]（2,3,4），[Ni〜II_5-Na_4〜I]（5,6,7）[Ni_5〜IILi_6〜I]（8）[Ni_8〜IIM_2〜I]（m = k（9,10），Rb（11,12）Cs（13,14）和[Ni_8〜II]（15）所有化合物均已通过单晶X射线衍射表征，但仅给出了完整的晶体学详细信息代表性分子[Ni_4Na_4-（fpo）_4（piv）_8]（2）[Ni_5Na_4（OH）_2-（mpo）_4（piv）_8（Hpiv）_2（MeCN）_2]（5），[nI_5Li_6（OH） ）_2（fpo）_2（piv）-12（Hpiv）_4] [Ni_8K_2（OH）_4（ppo）_4（piv）_10（Hppo）_2-（Hpiv）_2（MeCN）_2]（9）[Ni_8Rb_2（ OH）_4-（ppo）_4（piv）_10（Hppo）_2（Hpiv）-2（MeCN）_2]（11）[Ni_8Cs_2（OH）_4（ppo）_4（piv）_10（Hppo）_2-（Hpiv ）_2（PhCH_2CO_2）_10（Hmpo）_8]（15）已对每个样品进行了变体磁化强度测量ch型复合物[Ni_4〜IINa_4〜I]团簇显示分子间反铁磁耦合且自旋基态为s = 0 [N_5〜IINa_4〜I]型复合物也显示出反铁磁超交换，从而导致S = 1自旋基态相反，具有核[Ni_5〜IILi_6〜I]的分子抑制铁质相互作用素，从而导致低能态具有高多重性和自旋态S>1。[Ni_8〜IIM_2〜I]和[Ni_8〜II]簇为核内Ni-O-Ni角的性质呈比例关系。

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