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排序方式: 共有654条查询结果,搜索用时 15 毫秒
641.
Sylvia A. Gardner Henry B. Gordon Marvin D. Rausch 《Journal of organometallic chemistry》1973,60(1):179-188
Metalluorene complexes (π-C5H5)M(CO)(C12H8) (IVa)-(IVc) and (π-C5H5) (CO)(C12F8) (IVd)-(IVf) (M = Co, Rh and Ir) have been prepared from reactions of the appropriate (π-cyclopentadienyl) carbonylmetal diiodides with 2,2′-dilithhiolbiphenyl (IIa) and 2,2′-dilithiooctafluorobiphenyl (IIb), respectively The triphenylphoshine substitution reactions of cobalt compounds (IVa) and (IVd) have also been studied. Reaction of (IIa) and (IIb) with norbornadieneplatinum dichloride result in the preparation of metallocyclic platinum compounds (π-C7H8) and (π-C7H8)Pt(C12H8). A reaction of (IIb) with zirconocene dichloride produces (π-C5H5)2Zr(C12F8), the first example of a ziconium-containing metalofluorene. 相似文献
642.
Brian L. Booth Sylvia Casey Robert N. Haszeldine 《Journal of organometallic chemistry》1982,226(3):289-299
Perfluoronorbornadiene reacts with the compounds [M(PPh3)4] (M = Pt, Pd) and [IrCl(CO)(PMePh2)2] to give the adducts [(C7F8)M(PPh3)2] and [(C7F8)IrCl(CO)(PMePh2)2] in which one of the double bonds is coordinated to the metal atom. The platinum complex reacts further with [Pt(PPh3)4] to give [(C7F8){Pt(PPh3)2}2] having both double bonds coordinated to a Pt atom. The carbonylmetal anions [M?] react to form the mono-substitution products [(C7F7)M] (M = Mn(CO)5, Re(CO)5, Ir(CO)2(PPh3)2, Rh(CO)2(PPh3)2), but the use of an excess of [Fe(CO)2(η-C5H6)]? leads to substitution of one fluorine atom on each of the double bonds. The complex having M = Mn(CO)5 reacts with [Pt(PPh3)4] to afford the derivative [(C7F7){Mn(CO)4(PPh3)}{Pt(PPh3)2}], and the compound where M = Ir(CO)2(PPh3)2 undergoes an oxidative addition reaction with acetyl chloride. Oxidative coupling products have been isolated on UV irradiation of a mixture of perfluoronorbornadiene and [Fe(η4-CH2CRCHCH2)(CO)3] (R = H, Me), and under similar conditions the reaction with Fe(CO)5 affords [(C7F8)Fe(CO)4] in very low yield. 相似文献
643.
Constable EC Housecroft CE Neuburger M Reymann S Schaffner S 《Chemical communications (Cambridge, England)》2004,(9):1056-1057
The reaction of 3,6-di(2-pyridyl)-4-trimethylsilylpyridazine with silver(I) tetrafluoroborate gives the pentanuclear complex cation [Ag(5)L(4)](5+), in which the silver centres are arranged as a centred tetrahedron. 相似文献
644.
Sylvia Pulmannová 《International Journal of Theoretical Physics》1996,35(11):2309-2319
Starting with a quantum logic (a -orthomodular poset)L, a set of probabilistically motivated axioms is suggested to identifyL with a standard quantum logicL(H) of all closed linear subspaces of a complex, separable, infinite-dimensional Hilbert space. Attention is paid to recent results in this field. 相似文献
645.
We study the limiting distribution of the eigenvalues of the Ginibre ensemble conditioned on the event that a certain proportion lie in a given region of the complex plane. Using an equivalent formulation as an obstacle problem, we describe the optimal distribution and some of its monotonicity properties. 相似文献
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648.
K. Fichtner 《Crystal Research and Technology》1980,15(3):295-300
Two kinds of short symbols are proposed: 1. The short symbol of any OD groupoid-family consists of two parts: the symbol for the point group of the groupoid of partial symmetry operations and the symbol for the layer group. No information on the parameters is given. 2. The short symbol of any OD groupoid-family consists of those parts that correspond to the lines of the full symbol. There is, however, only one of the partial symmetry operations given, which transform a layer into an adjacent layer. These short symbols are suitable for storage of the symmetry data of OD structures in computer operated data banks. 相似文献
649.
Sylvia Feil 《Chemie in Unserer Zeit》2002,36(5):283-283
650.
Sylvia Feil 《Chemie in Unserer Zeit》2012,46(3):135-135