Molybdenum tris -tricarbonyl

MoC8K4Ng-2H20, Molybdate(IV), octacyano-, potassium, dihydrate, 34 157 M0N3O3C18H15, Molybdenum(O), tricarbonyl-tris(pyridine)-, 34 104 M0N11C56H108, Molybdate (V), octacyano-, tetrabutylammonium, 34 158 M04O16RU4C40H56, Molybdate(VI), tetrakis rj -l-isopropyl-4-methylbenzene)rutheniu-m(II)-, 34 200... 

N3CrF909S3Ci2H2i, Chromium(lll), (N,N, N"-trimethyl-1,4,7-triazacyclononane)tris(tri-fluoromethanesulfonato)-, 34 152 N3M0O3C18H15, Molybdenum(0), tricarbonyl-... 

MoN303C 2H,j, Molybdenum, tricarbonyl-tris(propionitrile)-, 28 31 MoN303C,8H2, Molybdenum, tris(tm-butyl isocyanide)tricarbonyl-,/flc-, 28 143 M0N4O2S4C10H20, Molybdenum, bis(di-ethyldithiocarbamato)dinitrosyl-, cis-, 28 145... 

MoN3CjgH27, Molybdenum, tris(tert-butylisocyanide)tricarbonyl-, /ac-, 28 143 OjMoNaCgH5.2C4H 10O2, Molybdate(l -), tricarbonyl( i -cyclopentadienyl)-, sodium, compd. with 1,2-dimethoxyethane(l 2), 26 343 OgMoPjCggHgg, Molybdenum,... 

N3Cr03Ct H27, Chromium, lris(tcrt-butyl isocyanide)tricarbonyl-,/ac-, 28 143 N3Fe02C29H27, Iron, dicarbonyltris(2-isocyano-l,3-dimethylben2ene)-, 26 S6 N3Mo03C,gH27, Molybdenum, tris(tert-butyl isocyanide)tricarbonyl-,/ac-,... 

Fig. 7. Representive stmctures for compounds of molybdenum(0) (a) Mo(CO)g (b) tris(acetonitrile)tris(carbonyl)molybdenum(0) (c) bis(l,2-diphenylphosphinoethane) bis (dinitrogen) molybdenum(0), [R2PCH2CH2PR2]2Mo(N2)2, where R = CgH, also known as Mo(dppe)2(N2)2, where dppe = 1,2 — diphenylphosphinoethane (d) cyclopentadienyl tricarbonyl molybdenum(0) anion, CpMo(CO)3, where Cp = cyclopentadienyl (e)...

The tris(chloromethyldifluorophosphine)molybdenum tricarbonyl exhibited strong CO absorptions typical for terminal CO groups at 2038 and 1970 cm.-1. Strong P-F absorptions were found at 866 and 842 cm.-1, which in view of the above-mentioned observation in the case of tetrakis(trifluorophosphine)nickel-(0) may also be representative ef the uncoordinated fluorophosphine. Compared with molybdenum tricarbonyl derivatives with nitrogen compounds as donor mole-... 

HglOoRujCijH, Ruthenium, nonacarbonyl-(3,3-dimethyl-l-butynyl)-(iodomercury)-/Wangu/o-tri-, 26 330 HgMo012Ru3C23Hi4, Ruthenium, nonacar-bonyl-( x3-3,3-dimethyl-1 -butynyl) p.-[tricarbonyl(-ri -cyclopentadienyl)-molybdenum]mercury -/riangu/o-tri-, 26 333... 

While arsabenzene does not act as a nucleophile toward hard acids, it does form a-Mo(CO)5 complex 57 on treatment with pyridine-Mo(CO) and boron trifluoride etherate100). Qualitatively complex 57 seems rather weak since on heating it is destroyed, forming small quantities of tc-Mo(CO)3complex 58 101). This rt-complex is more conveniently prepared directly from arsabenzene and Mo(CO)6 or from acid-catalyzed displacement from tris-(pyridine)molybdenum tricarbonyl. 

Richard followed the course of the reactions of Cr(CO)6 and Mo(CO)6 with hexamethylborazine by UV-vis spectroscopy but although he observed that the intensity of the absorption maximum of the hexacarbonyls at around 290 nm decreased and a new band at around 350 nm appeared, he was unable to identify the new product. Experiments with other starting materials such as norborna-diene chromium and molybdenum tetracarbonyl or tris(aniline) molybdenum tricarbonyl which readily react with arenes by ligand exchange, also failed. The key to success was to use tris(acetonitrile) chromium tricarbonyl as the precursor, which in dioxan under reduced pressure afforded the desired hexamethylborazine chromium tricarbonyl as a stable crystalline solid in 90% yield. This was the breakthrough and, after we had communicated the synthesis and spectroscopic data of the complex in the January issue 1967 of Angewandte Chemie, Richard finished his work and defended his Ph.D. thesis in June 1967. Six months before, in December 1966,1 defended my Habilitation thesis in front of the faculty and became Privatdozent (lecturer) on the 1st of January 1967. 

As indicated in Section 14.20.3.4, borepins can react with organometallics to form complexes in which the borepin ring serves as an rf ligand to the metal. Thus, 1-methylborepin 15 reacted with tris(pyridine)molybdenum tricarbonyl to afford the corresponding molybdenum complex 16 as a red, air-sensitive oil, as in Equation (1) <19970M1884>. 

The cyclodimerization of 3,3-dimethylcyclopropene to form 3,3,6,6-tetramethyl-exo-tri-cyclo[3.1.0.0 ]hexane (4) can also be achieved with pentacarbonyliron in toluene at 95"C in 3 hours (no yield given) or in tetrahydrofuran at 60 °C with catalytic amounts of hexacarbonyl-molybdenum (77% yield, 93% conversion) or hexacarbonyltungsten (86.5% yield). With nonacarbonyldiiron a stoichiometric ring-opening reaction and formation of tricarbonyl(2-methyl-l-propenylketene)iron has been observed (see Section 2.C. for details). A 40% yield of the tricyclic dimer 4 is obtained under the catalytic action of ( / -cycloocta-l,5-diene)(t -cyclopentadienyl)cobalt(I). ... 

Lappert and Poland (1969) were the first authors who reported on the discovery and characterization of mononuclear alkyldiazenido complexes by reaction of (tri-methylsilyl)diazomethane with tricarbonyl(cyclopentadienyl)molybdenum hydride and the analogous tungsten hydride. Scheme (10-18) demonstrates that these reactions are not simple substitutions of a carbonyl by a diazenido ligand, but that they are insertions of the diazoalkane into the M-H bond (see also Lappert and Lorberth, 1967). 

FjFeMoOjP2C34H2g, Iron(l+), p-acetyl-2k C lK0-tetracarbonyl-lK C,2K C-bis[ 1,2-(Ti -cyclopentadienyl)l(tri-phenylphosphine-licP)molybdenum-, hexafluorophosphate(l-), 26 241 FjFeMoOgPCijHij, lron(l+), p-acetyl-2K-C icO-pentacarbonyl-li C,2K C-bisl 1,2-(tl -cyclopentadienyl)]molybdenum-, hexafluorophosphatefl—), 26 239 FgFe02PC, H j, Iron(l+), (ii -cyclopenta-dienyl)dicarbonyl(tetrahydrofuran)-, hexafluorophosphatefl—), 26 232 F4Fe204P2CjjH28, lron(l+), p-acetyl-2K-C 1 KO-tricarbonyl-1 x, 2KC-bis [ 12-(il -cyclopentadienyl))(tripheiiylphos-phine-2icP)di-, hexafluorophos-phate(l-), 26 237... 

Trichloro(tripyridine)chromium(III), synthesis 36 Tris(3-bromoacetylacetonato)chromium(III), synthesis 37 Cyclopentadienyl tricarbonyl hydrides of chromium, molybdenum, and tungsten, synthesis 38 Trichloro(tripyridine)molybdenum(III), synthesis 39 Potassium octacyanotungstate(IV) 2-hydrate, synthesis 40 Chlorine(CP )-labeled thionyl chloride, silicon tetrachloride, boron chloride, germanium (IV) chloride and phosphorus(III) chloride, synthesis 44 Unipositive halogen complexes, synthesis 46 Monopyridineiodine(I) chloride, synthesis 47 Manganese(III) acetylacetonate, synthesis 49 Triiron dodecacarbonyl, synthesis 52... 

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