通过在245°C的十八烯中热解单源前体[Cp(CO)2 FeBi(OAc)2 ](1),然后在600°C下煅烧3 h ,形成近乎纯相的铋铁氧体颗粒。。相反,经过轻微修饰的化合物[Cp(CO)2 FeBi(O 2 C t Bu)2 ](2)仅产生不同氧化铋相的混合物,从而揭示了分子设计在材料合成中的独特影响。通过X射线衍射,透射电子显微镜和能量色散X射线光谱研究了所得材料的化学组成,形态和结晶度。此外,通过傅里叶变换红外和紫外可见光谱研究了光学性质,显示了在590 nm(2.2 eV)可见光范围内的强带隙吸收。通过振动样品和超导量子干涉仪磁强计以及57 FeMössbauer光谱来探测磁性。
Crystal and molecular structure of bismuth( III ) 2,2-dimethylpropanoate
摘要:
X-Ray investigations of single crystals of bismuth(III) 2,2-dimethylpropanoate (pivalate), obtained by sublimation in vacuo, reveal its structure to consist of isolated tetrameric units [Bi(O2CCMe3)3]4; each of the twelve crystallographically inequivalent Bi atoms has practically the same coordination environment of nine O atoms at distances of 2.24–3.27 Å.
A New Methodology for Synthesis of Aryl Bismuth Compounds: Arylation of Bismuth(III) Carboxylates by Sodium Tetraarylborate Salts
作者:Vitalie Stavila、John H. Thurston、Darío Prieto-Centurión、Kenton H. Whitmire
DOI:10.1021/om7009667
日期:2007.12.1
Sodium tetraarylborate salts Na[BAr4] (Ar = C6H5 (Ph), C6H4-Me-4 (tolyl), C6H4-F-4) are found to be efficient arylating species for a range of bismuth(III) aromatic and aliphatic carboxylates including Bi(Hsal*)3 (Hsal* = 2-HO-C6H4CO2− (Hsal); 4-Me-2-HO-C6H3CO2− (Hsal4Me); or 3-MeO-2-HO-C6H3CO2− (Hsal3OMe)) and Bi(O2CR)3 (R = Me, CMe3, and CF3) to produce triaryl bismuth compounds. The reactions may
发现四芳基硼酸钠盐Na [BAr 4 ](Ar = C 6 H 5(Ph),C 6 H 4 -Me-4(甲苯基),C 6 H 4 -F-4)在一定范围内是有效的芳基化物种。铋(III)的芳族和脂族羧酸盐,包括铋(Hsal *)3(Hsal * = 2-HO-C 6 H ^ 4 CO 2 -(Hsal); 4-ME-2-HO-C 6 H ^ 3 CO 2 -(Hsal 4Me);或3-的MeO-2-HO-C 6 H ^ 3 CO 2 -(Hsal 3OMe))和Bi(O 2 CR)3(R = Me,CMe 3和CF 3)生成三芳基铋化合物。反应可以在乙醇,四氢呋喃或丙酮中进行。芳基铋双(水杨酸酯)BiPh(Hsal)2和Bi(甲苯基)(Hsal)2在回流的THF中表现出相似的反应性,可用于生产混合的芳基双变BiBi x(甲苯基)3- x。红外光谱,X射线晶体学,核磁共振光谱(1 H,11 B,13
Creating Iron- and Rhenium-Bismuth Bonds by Reactions with Organometallic Hydrides
[FpBiOCH(CF3)2}2]2 (5) can be achieved by reaction of [FpH] with [BiOCH(CF3)2}3(thf)]2 and carboxylates [FpBi(O2CR)2]2 are generated upon treatment of [FpH] with [Bi(O2CR)3] (R = CH3, tBu). While the compounds [Fp-Bi(O2CR)2]2 can also be obtained from reactions with Fp-Fp, they are formed far more readily using [FpH] as the precursor. They typically crystallize as dimers, like the alkoxide 5. A monomeric
ferrite particles were formed by thermolysis of the single-sourceprecursor [Cp(CO)2FeBi(OAc)2] (1) in octadecene at 245 °C, followed by subsequent calcination at 600 °C for 3 h. In contrast, the slightly modified compound [Cp(CO)2FeBi(O2CtBu)2] (2) yielded only mixtures of different bismuth oxide phases, revealing the distinctive influence of molecular design in material synthesis. The chemical composition
通过在245°C的十八烯中热解单源前体[Cp(CO)2 FeBi(OAc)2 ](1),然后在600°C下煅烧3 h ,形成近乎纯相的铋铁氧体颗粒。。相反,经过轻微修饰的化合物[Cp(CO)2 FeBi(O 2 C t Bu)2 ](2)仅产生不同氧化铋相的混合物,从而揭示了分子设计在材料合成中的独特影响。通过X射线衍射,透射电子显微镜和能量色散X射线光谱研究了所得材料的化学组成,形态和结晶度。此外,通过傅里叶变换红外和紫外可见光谱研究了光学性质,显示了在590 nm(2.2 eV)可见光范围内的强带隙吸收。通过振动样品和超导量子干涉仪磁强计以及57 FeMössbauer光谱来探测磁性。
Crystal and molecular structure of bismuth( III ) 2,2-dimethylpropanoate
作者:Sergey I. Troyanov、Alexander P. Pisarevsky
DOI:10.1039/c39930000335
日期:——
X-Ray investigations of single crystals of bismuth(III) 2,2-dimethylpropanoate (pivalate), obtained by sublimation in vacuo, reveal its structure to consist of isolated tetrameric units [Bi(O2CCMe3)3]4; each of the twelve crystallographically inequivalent Bi atoms has practically the same coordination environment of nine O atoms at distances of 2.24–3.27 Å.