14405-84-6Relevant articles and documents
MONONUCLEAR ANIONIC FORMYL COMPLEXES; SYNTHESIS AND PROPERTIES
Selover, J.C.,Marsi, Marianne,Parker, David W.,Gladysz, J.A.
, p. 317 - 329 (1981)
A series of kinetically unstable mononuclear anionic formyl complexes have been prepared by the action of Li(C2H5)3BH on neutral metal carbonyl precursors.One of these, Li+-, is shown to decompose by a hydride transfer disproportionation mechanism involving the by-product (C2H5)3B.
Ultrahigh-field NMR spectroscopy of quadrupolar transition metals: 55Mn NMR of several solid manganese carbonyls
Ooms, Kristopher J.,Feindel, Kirk W.,Terskikh, Victor V.,Wasylishen, Roderick E.
, p. 8492 - 8499 (2008/10/09)
55Mn NMR spectra acquired at 21.14 T (νL( 55Mn) = 223.1 MHz) are presented and demonstrate the advantages of using ultrahigh magnetic fields for characterizing the chemical shift tensors of several manganese carbonyls: η5-CpMn(CO)3, Mn 2(CO)10, and (CO)5MnMPh3 (M = Ge, Sn, Pb). For the compounds investigated, the anisotropies of the manganese, chemical shift tensors are less than 250 ppm except for η5- CpMn(CO)3, which has an anisotropy of 920 ppm. At 21.14 T, one can excite the entire ml = 1/2 ? ml = -1/2 central transition of η5-CpMn(CO)3, which has a breadth of approximately 700 kHz. The breadth arises from second-order quadrupolar broadening due to the 55Mn quadrupolar coupling constant of 64.3 MHz, as well as the anisotropic shielding. Subtle variations in the electric field gradient tensors at the manganese are observed for crystallographically unique sites in two of the solid pentacarbonyls, resulting in measurably different CQ values. MQMAS experiments are able to distinguish four magnetically unique Mn sites in (CO)5MnPbPh3, each with slightly different values of δiso, CQ, and ηQ.
REDUCTIONS OF METAL CARBONYLS BY QUATERNARY AMMONIUM BOROHYDRIDES
Gibson, Dorothy H.,Ahmed, Fahim U.,Phillips, Kenneth R.
, p. 325 - 336 (2007/10/02)
Quaternary ammonium borohydrides, used directly or generated in phase transfer reactions, are highly effective reagents for preparing metal carbonyl anions from metal carbonyls 5-C5H5)2Mo2(CO)6> and from some metal carbonyl halides 5-C5H5Mo(CO)3Cl>.Where strongly basic anions would be fromed from a halide 5-C5H5Ru(CO)2Br>, the reactions provide efficient syntheses of the corresponding hydrides instead.The anion η5-C5H5Fe(CO)2- is not accessible bythese techniques; reaction of η5-C5H5Fe(CO)2Br yields the iron dimer (via the highly nucleophilic anion) and the dimer is unreactive toward Q+BH4-.Reductions of Re2(CO)10 conducted in CH2Cl2 provide Re2(CO)9Cl- in high yield.
