Formation of η<sup>2</sup>-aroyl, η<sup>1</sup>-halogenocarbyne or sterically crowded aryldiazenide ligands in the reactions of ring-substituted tricarbonyl[hydrotris(pyrazolyl)borato]-molybdate and -tungstate anions with arenediazonium cations and related oxidants
作者:Fergus J. Lalor、Timothy J. Desmond、Gerard M. Cotter、Claire A. Shanahan、George Ferguson、Masood Parvez、Barbara Ruhl
DOI:10.1039/dt9950001709
日期:——
with 3- or 4-substituted arenediazonium cations [R′N2]+ yielding carbonyl-substitution (i.e. aryldiazenido) products [MoHB(pz)3}(CO)2(N2R′)]. reaction of the methylsubstituted analogue [ML*(CO)3]–[L*= tris(3,5-dimethylpyrazolyl)hydroborate; M = Mo or W] led, via oxidative formation of aryl radicals and [ML*(CO)3]˙, to η2-aroyl complexes [ML*(CO)2(η2-COR′)][R′= C6H4X-4 (X = NO2, CN, COMe, CF3, H, Me
尽管氢三(吡唑基)硼酸盐络合物[Mo HB(pz)3 }(CO)3 ] –与3-或4-取代的芳族重氮阳离子[R'N 2 ] +反应,生成羰基取代(即芳基二氮杂)产品[ Mo HB(pz)3 }(CO)2(N 2 R')]。甲基取代的类似物[ML *(CO)3 ] – [L * =三(3,5-二甲基吡唑基)氢硼酸酯的反应;M = Mo或W]为首,通过芳基的氧化形成和[ML *(CO)3 ]˙,至η 2种芳酰基配合物[ML *(CO)2(η 2-COR')] [R'= C 6 H 4 X-4(X = NO 2,CN,COMe,CF 3,H,Me,OMe或NMe 2)或C 6 H 4 X-3(X = NO 2或OMe)]在乙腈中,或在卤代烷烃CH 2 Cl 2或CHX 3(X = Br或X )的存在下与卤代碳炔络合物[ML *(CO)2(CX)](X = Cl,Br或I)。一世)。复杂的[MoL