A Hexamethyl Derivative of [9]Mercuracarborand-3: Synthesis, Characterization, and Host−Guest Chemistry
摘要:
Hexamethyl[9]mercuracarborand-3, [(CH3)(2)C2B10H8Hg](3) (3), was isolated in 60% yield from the reaction of closo-1,2-Li-2-9,12-(CH3)(2)-1,2-C2B10H8 with mercuric acetate. The title compound was characterized by multinuclear NMR spectroscopy and its halide ion complexes by negative ion FAB mass spectrometry, Both 3 and its complexes are air-stable and soluble in poorly or noncoordinating solvents such as CH2Cl2 and toluene. Compound 3 crystallized from acetonitrile in the triclinic space group P (1) over bar with a = 13.362(6) Angstrom, b = 14.071(6) Angstrom, and c = 14.303(6) Angstrom, alpha = 105.15(1)degrees, beta = 95.77(1)degrees, and gamma = 110.14(1)degrees, V = 2383 Angstrom(3), and Z = 2. The final discrepancy indexes were R = 0.059, R(w) = 0.064 for 5987 independent reflections with (I > 3 sigma(I). Halide ion complexes of 3 were formed upon treatment of 3 with salts of the corresponding halide ions. The complexation behavior of 3 in acetone was studied by Hg-199 NMR spectroscopy, and the guest/host ratio of the resulting complexes has been established to be 1, 2, and 2 for chloride, bromide, and iodide, respectively.
Regioselective Insertion of Carborynes into Ethereal C−H Bond: Facile Synthesis of α-Carboranylated Ethers
作者:Sunewang R. Wang、Zaozao Qiu、Zuowei Xie
DOI:10.1021/ja201126h
日期:2011.4.20
Carborynes can exist in two resonance forms, bonding form vs biradical form. The biradical form can be readily generated via the elimination of LiI from 1-iodo-n-lithio-1,n-C(2)B(10)H(10) (n = 2, 7) under UV irradiation. They can undergo α-C-Hbondinsertion with aliphatic ethers, affording α-carboranylated ethers in excellent regioselectivity at room temperature. This serves as a new methodology for
Carboracycles: Macrocyclic Compounds Composed of Carborane Icosahedra Linked by Organic Bridging Groups
作者:Wei Jiang、Igor T. Chizhevsky、Mark D. Mortimer、Weilin Chen、Carolyn B. Knobler、S. E. Johnson、F. A. Gomez、M. Frederick Hawthorne
DOI:10.1021/ic960354k
日期:1996.1.1
family of macrocyclic compounds are described, together with their precursors. These cycles are composed of icosahedralcarboranes linked via their carbon vertices through 1,3-trimethylene, alpha,alpha'-1,3-xylylene, or alpha,alpha'-2,6-lutidylene groups. The compounds cyclo-(1,3-trimethylene-1',2'-closo-1',2'-C(2)B(10)H(10))(4) (6a), cyclo-(1,3-trimethylene-1',2'-closo-9',12'-dimethyl-1',2'-C(2)B(10)H(8))(4)
Synthesis of 9,9´,12,12´-substituted cobalt bis(dicarbollide) derivatives
作者:S. A. Anufriev、I. B. Sivaev、V. I. Bregadze
DOI:10.1007/s11172-015-0924-4
日期:2015.3
A partial degradation of 9,12-disubstituted derivatives of ortho-carboranes 9,12-X2-1,2-C2B10H10 (X = Br, Alk, Ar) led to the corresponding substituted nido-carboranes [5,6-X2-7,8-C2B9H10]–, which on the reaction with cobalt(II) chloride gave new 9,9´,12,12´-tetrasubstituted derivatives of cobalt bis(dicarbollide) [9,9´,12,12´-X4-3,3´-Co(1,2-C2B9H9)2]–.
Light-promoted copper-catalyzed cage C-arylation of <i>o</i>-carboranes: facile synthesis of 1-aryl-<i>o</i>-carboranes and <i>o</i>-carborane-fused cyclics
作者:Hangcheng Ni、Zhenpin Lu、Zuowei Xie
DOI:10.1039/d0nj02029j
日期:——
Light-promoted, coppercatalyzed cage C–H arylation of o-carboranes with aryl halides has been achieved, leading to the facile synthesis of a variety of 1-aryl-o-carboranes and o-carborane-fused cyclics. This method has the following features: (1) using o-carboranes instead of prefunctionalized iodocarboranes as starting materials; (2) employing earth abundant copper as a catalyst; and (3) room-temperature
Formal Insertion of <i>o</i>-Carborynes into Ferrocenyl C–H Bonds: A Simple Access to <i>o</i>-Carboranylferrocenes
作者:Sunewang Rixin Wang、Zuowei Xie
DOI:10.1021/om300324n
日期:2012.6.25
[1-(η5-C5H4)(3-R-1,2-C2B10H10)]Fe(η5-C5H5) (R = H, Ph, Me, Cl, Br, and I) in 19–44% isolated yields. On the other hand, in addition to the desired C–H bond insertion products [1-(η5-C5H4)(3-X-1,2-C2B10H10)]Fe(η5-C5H5), bis(ferrocenyl)-o-carboranes 1,2-[(η5-C5H5)Fe(η5-C5H4)]2-3-X-1,2-C2B10H9 were isolated from the reactions of 1-I-2-Li-3-X-1,2-C2B10H9 (X = Cl, Br, and I) in 12%, 15%, and 8% yields, respectively
的插入ø -carborynes(1,2-脱氢ö -carboranes)二茂铁成C-H键进行了说明,提供的官能化二茂铁的制备方法方便Ò -carboranes。碳炔前体1-I-2-Li-9,12-Me 2 -1,2-C 2 B 10 H 8或1-I-2-Li-3-R-1,2-C 2 B的反应10 ħ 9(R = H,PH,Me中,氯,溴,和I)与在80℃下在环己烷2.5当量的二茂铁,得到[1-(η 5 -C 5 H ^ 4)(9,12-ME 2 -1,2-C 2 B 10 H 9)]的Fe(η 5 -C 5 H ^ 5)和[1-(η 5 -C 5 H ^ 4)(3-R-1,2--C 2乙10 ħ 10)]的Fe(η 5 -C 5 H ^ 5)(R = H,Ph,Me,Cl,Br和I),分离产率为19-44%。在另一方面,除了所期望的C-H键插入产品[1-(η 5 -C 5 H ^ 4)(3-X-1