Synthesis, Structure, and Magnetic Properties of the Oxalate-Based Bimetallic Ferromagnetic Chain {[K(18-crown-6)][Mn(H2O)2Cr(ox)3]}g src="http://pubs.acs.org/

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• 作者：Eugenio Coronado ; José ; R. Galá ; n-Mascar&oacute ; s ; Carlos J. G&oacute ; mez-Garcí ; a ; and Carlos Martí ; -Gastaldo
• 刊名：Inorganic Chemistry
• 出版年：2005
• 出版时间：September 5, 2005
• 年：2005
• 卷：44
• 期：18
• 页码：6197 - 6202
• 全文大小：143K
• 年卷期：v.44,no.18(September 5, 2005)
• ISSN：1520-510X

文摘

The salt [K(18-crown-6)][Mn(H₂O)₂Cr(ox)₃]·0.5(18-crown-6) (1) has been prepared and structurally and magneticallycharacterized. It crystallizes in the P2₁/c space group [a = 21.011(2) Å, b = 11.265(2) Å, c = 15.748(3) Å, ges/gifchars/beta2.gif" BORDER=0 ALIGN="middle"> =105.952(6)ges/entities/deg.gif">, V = 3584(1) ų, and Z = 4] and contains [Mn(H₂O)₂Cr(ox)₃]_{ges/entities/infin.gif">} chains connected through hydrogenbonding to form 2D anionic networks. The magnetic exchange is ferromagnetic [J = +2.23(2) cm^-1] in the chainand also in between chains, reaching bulk ferromagnetic ordering below 3.5 K.