Novel thermolytic products and their structures derived from thermolysis of isomerized products of spiro[4.4]nona-1,3-diene(dicarbonyl)[ethoxy(aryl) carbene]iron phosphine adducts [(eta(3)-C9H12)Fe{C(OC2H5)Ar}(CO)(2)PPh3]

摘要

Heating a benzene solution of the isomerized product of spiro[4.4]nona-1,3-diene(dicarbonyl)[ethoxy(aryl)carbene]iron phosphine adduct[(eta(3)-C9H12)Fe{C(OC2H5)(C6H4CH3-o)}(CO)(2)PPh3] (1) in a sealed quartz tube at 85-90 degrees C for 72 h gave the ring-opened eta(4) olefin-coordinated dicarbonyliron phosphine complex [Fe{eta(4)-C5H7CH=CHCH2CH=C(OC2H5)C6H4CH3-o}(CO)(2)PPh3] (3) and cyclobutane derivative [C24H22O7] (4). The thermal decomposition of analogous isomerized product [(eta(3)-C9H12)Fe{C(OC2H5)(C6H4CH3-p)}-(CO)(2)PPh3] (2) afforded the corresponding eta(4) olefin-coordinated dicarbonyliron phosphine complex [Fe{eta(4)-C5H7CH=CHCH2CH=C(OC2H5)C(6)H(4)CH(3-)p}(CO)(2)PPh3] (6) and compound 4. The structures of products 3 and 4 have been established by X- ray diffraction studies. (c) 2007 Elsevier B.V. All rights reserved.