Factors influencing coordination versus oxidative addition of C-H bonds to molybdenum and tungsten: Structural and spectroscopic evidence that the calixarene framework promotes C-H bond activation

被引:8
作者
Buccella, Daniela
Tanski, Joseph M.
Parkin, Gerard [1 ]
机构
[1] Columbia Univ, Dept Chem, New York, NY 10027 USA
[2] Vassar Coll, Poughkeepsie, NY 12604 USA
关键词
D O I
10.1021/om700279c
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Mo(PMe3)(6) and W(PMe3)(4)(eta(2)-CH2PMe2)H react with the diphenol CH2((ArOH)-O-Me2)(2) (Ar-Me2 = C6H2Me2) to yield [kappa(2),eta(2)-CH2((ArO)-O-Me2)(2)]M(PMe3)(3)H-2 (M = Mo, W), which possess agostic M-H-C interactions. NMR spectroscopic studies provide evidence that the tungsten compound is in facile equilibrium with the metalated trihydride [kappa(3)-CH((ArO)-O-Me2)(2)]W(PMe3)(3)H-3.
引用
收藏
页码:3275 / 3278
页数:4
相关论文
共 16 条
[11]  
Melnick JG, 2006, DALTON T, P4207, DOI 10.1039/b607916d
[12]   SYNTHETIC, STRUCTURAL, AND MECHANISTIC STUDIES OF THE C-H BOND ACTIVATION OF PHENOLS BY W(PME3)6 AND W(PME3)4(ETA-2-CH2PME2)H [J].
RABINOVICH, D ;
ZELMAN, R ;
PARKIN, G .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (12) :4611-4621
[13]   COMPETITIVE SP3 AND SP2 C-H BOND ACTIVATION OF PHENOLS BY W(PME3)6 AND W(PME3)4(ETA-2-CH2PME2)H - FORMATION OF 4-MEMBERED AND 5-MEMBERED OXAMETALLACYCLES [J].
RABINOVICH, D ;
ZELMAN, R ;
PARKIN, G .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (26) :9632-9633
[14]   Complexes of tungsten(IV,VI) derived from linked aryloxide ligands [J].
Redshaw, Carl ;
Humphrey, Simon M. .
POLYHEDRON, 2006, 25 (09) :1946-1954
[15]   Synthesis of novel oxo complexes of tungsten and molybdenum with various chalcogen-bridged chelating bis(aryloxo) ligands and their catalytic behavior for ring-opening metathesis polymerization [J].
Takashima, Y ;
Nakayama, Y ;
Yasuda, H ;
Harada, A .
JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2002, 651 (1-2) :114-123
[16]  
WISEMAN P, 1979, EDUC CHEM, V16, P180