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New routes to the synthesis of chloro-carbonyls of palladium(II) and platinum(II)
No full textABSTRACT [Pt(CO)(x)](n) (x similar to 2), the already described species obtained by the reaction of platinum(0) olefin complexes with carbon monoxide, reacts promptly at room temperature with SO2Cl2 under CO affording cis-PtCl2(CO)(2). [Pd-2(CO)(y)](n) (y similar to 1), obtained by Pd(dba)(2) and CO at room temperature, reacts in the same conditions yielding Pd2Cl4(CO)(2). Similarly, although more slowly, finely divided platinum and palladium, in the form of metal blacks, react with SO2Cl2 and CO at room temperature producing again cis-PtCl2(CO)(2) and Pd2Cl4(CO)(2), respectively. In the absence of CO no reaction is observed within 4 weeks
SYNTHESES AND REACTIONS OF ANSA-[2,2-BIS(ETA-CYCLOPENTADIENYL)PROPANE]-TUNGSTEN AND ANSA-[2,2-BIS(ETA-CYCLOPENTADIENYL)PROPANE]-MOLYBDENUM COMPOUNDS
No full textPREPARATION AND STRUCTURAL CHARACTERIZATION OF 3 ADAMANTYLCARBOXYLATO DIRUTHENIUM(II,II), DIRUTHENIUM(II,III) AND DIMOLYBDENUM(II,II) COMPOUNDS
No full textThree new compounds containing adamantylcarboxylate ligands, [Ru~(C~~H&O&(CH~OH)~].~CH~OH (l),
[Ru~(C,~,~CO~)~(C~~)(CH~~H)2~CIH. ,OH (2) and Mo,(C,~H,CO,),(C,H,O)~ (3), have been prepared by
reacting K,[Ru2(C0&]-4Hz0, &MO&~, and Moz(OAc), with C&H,,CO,H. Their crystal structures have been
determined. Crystals are as follows. 1: space group P2,/c, a = 12.966(2), b = 16.541(4), c = 12.573(3) A, p= 118.77(2)“,
V= 2364(l) A3, Z = 2, Ru-Ru distance = 2.2809(9) A. 2: space group P2,212,, u = 13.062(l), b = 26.375(4), c = 11.943(2)
A3, Z=4. The Ru-Ru distance is 2.254(8) A. 3: space group Pl, a = 12.897(2), b = 17.308(2),
LY= 107.703(9), p=92.06(1), y=93.01(1)‘, V=2529.0(6) A3, Z=2. The average Mo-MO distance
+he formation of 1 from the starting tetracarbonato complex appears to involve disproportionation
of 2Rud+ to Ru,‘+ and 2Ru3+.
Introductio
Synthesis, crystal structure and polymorphism of a mu-oxo bridged binuclear iron(III) complex of 2,2 ': 6 ',2 '': 6 '' 2 ''-quaterpyridine
No full textAqueous solutions of iron(III) perchlorate and 2,29:6920:60,2--quaterpyridine (L, C20H14N4) in the presence
of triethylamine gave deep red crystals of two polymorphic phases of [{FeL(H2O)}2(m-O)][ClO4]4?2H2O 1,
a m-oxo derivative of iron(III). One has been identified as a monoclinic phase, space group P21/n, with unit cell
a = 13.080(3), b = 14.045(3), c = 13.778(3) Å, b = 105.52(3)8 and the other as an orthorhombic one, space group
Pbca with unit cell a = 14.175(2), b = 16.463(1) and c = 20.949(3) Å. The crystal structures of both polymorphs
have been studied and shown to correspond to slightly different geometries of the same cation. To reduce some
degree of disorder in the perchlorate anions, the monoclinic phase has also been studied at 2150 8C, giving an
ordered pattern. The crystal structures of the two phases are compared. The two iron atoms are at the centre
of corner-sharing octahedra, with the water trans to the m-bonded oxide
ANSA-[(2,2-BIS-ETA-CYCLOPENTADIENYL)PROPANE]-MOLYBDENUM AND ANSA-[(2,2-BIS-ETA-CYCLOPENTADIENYL)PROPANE]-TUNGSTEN CHEMISTRY AND RELATED STUDIES
No full textTrifluoromethanesulfonato derivatives of ruthenium(II)
No full textABSTRACT The reactivity of Ru(O2CNiPr2)2(CO)2(PPh3)2 (1), towards CF3SO3H (TfOH, trifloromethanesulfonic acid or triflic acid) has been studied and the products [Ru(O2CNiPr2)(CO)2(PPh3)2][OTf] (2), and Ru(OTf)2(CO)2(PPh3)2 (3), have been obtained, the former being structurally characterised as one of the few examples of cationic N,N-dialkylcarbamato complexes. In compound 2, the N,N-di-iso-propylcarbamato group is bidentate. In experiments aimed at obtaining Ru(OTf)2(CO)2(PPh3)2 according to the literature method, i.e. from Ru(CO)3(PPh3)2 and TfOH, the intermediate species [RuH(CO)3(PPh3)2][OTf] (4), corresponding to the oxidative addition of triflic acid, has been intercepted. Treatment of this derivative in refluxing toluene followed by addition of methanol afforded the compound [RuH(CO)2(PPh3)2(CH3OH)][OTf] (5), which has been characterised by single-crystal X-ray diffractometry
N,N-dialkylcarbamato complexes of chromium(III). Crystal and molecular structure of two non-homoleptic products of chromium(III), Cr3(μ3-O)(O2CNEt2)6Cl(NHEt2) and Cr2(O2CNiPr2)5Cl
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