Trzmiel, Simon P. O. published the artcileChromous siloxides of variable nuclearity and magnetism, COA of Formula: C6H16OSi, the publication is Dalton Transactions (2022), 51(13), 5072-5081, database is CAplus and MEDLINE.
Treatment of Cr[N(SiMe3)2]2(THF)2 with HOSiR3 (R = Et, iPr) in THF afforded the bridged CrII siloxide complexes Cr3(OSiEt3)2(μ-OSiEt3)4(THF)2 and Cr2(OSiiPr3)2(μ-OSiiPr3)2(THF)2 in high yield. Exposure of these compounds to vacuum in aliphatic solvents led to the loss of coordinated THF and to the formation of the homoleptic chromous siloxides Cr4(μ-OSiEt3)8 and Cr3(OSiiPr3)2(μ-OSiiPr3)4, resp., in moderate to high yield. Use of TMEDA as a potentially bidentate donor mol. gave the monomeric cis-coordinated siloxide Cr(OSiiPr3)2(tmeda) (tmeda = N,N,N’,N’-tetramethylethane-1,2-diamine). Oxidation of Cr2(OSiiPr3)2(μ-OSiiPr3)2(THF)2 with CHI3 and C2Cl6 produced the trigonal bipyramidal chromic compound CrIII(OSiiPr)3(THF)2 and asym. coordinated Cr2Cl3(OSiiPr3)3(THF)3, resp. Magnetic measurements (Evans and SQUID) hinted at (a) antiferromagnetic interactions between the CrII centers, (b) revealed higher effective magnetic moments (μeff) for cis-coordinated monomeric heteroleptic complexes compared to trans-coordinated ones, and (c) pointed out the highest (μeff) for the tetranuclear complex Cr4(μ-OSiEt3)8 (6.26μB, SQUID, 300 K; Cr···Cradjacent average 2.535 Å).
Dalton Transactions published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C19H36BNO2Si, COA of Formula: C6H16OSi.
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