Group V donors

Group V Donors. The i.r. and Raman spectra of mixed metal complexes of the type [(NH3)5RuN20s(NH3)5]Br4 have been recorded. Approximate force constants calculated for [Os(NH3)5N2]Br2 and related complexes were calculated and the M—Nj—M vibrations in the dinuclear complexes analysed. 

Irradiation of an aqueous solution of [Os(NH3)5(N2)] by electrons or y-rays gives [Os(NH3)4(NH2XN2)] by action of OH radicals. Complexes involving heterocyclic ligands [Os(NH3)4(N2)L] (L = pyrazine, JV-methylpyrazium, isonicotinamide, and isonicotinic acid) have been synthesized by displacement of N2 from [Os(NH3)4(N2)2] under Ar. Aerial oxidation of these complexes in the presence of HX (L = pyr or isonicotinic acid) leads to the reversible formation of [Os(NH3)4X(L)]X2 (X = Cl or Br) pK, measurements indicate marked back bonding from osmium to the heterocycle. 

Group V Donors. Molecular nitrogen complexes. The known complex [Ru(en)2(N2)-(H20)]2+ has been prepared by treating [Ru(en)3]2+ with alkaline NO.29 This 

Group V Donors. N-donor ligands. An unusual molecular nitrogen complex of ruthenium(iii) with formula [Ru(NH3)4(N2)(H20)](N03)3 has been isolated from the nitric acid oxidation of the known [Ru(NH3)4(N2)(H20)]. K the oxidation is carried out by iodine, a compound analysing as [Ru(N2)(NH3)4-I(NH3)4Ru(N2)]l4 is obtained which is believed to contain both Ru and Ru . As expected the ruthenium(iii) dinitrogen complexes are less stable in solution than corresponding ruthenium(ii) compounds. 

Formal redox potentials ( ) have been measured for the system 

The low-temperature (4 K) e.s.r. spectra of [Ru(en)3], measured either in [Rh(en)3Cl3]2,NaCl,6H20 crystals or in [Co(en)3]Br3,3H20 powder, give 

A new method for preparing molecular nitrogen complexes has been described, involving the attack of NO on a R -amine complex  

The method has the advantage of being clean, rapid, and quantitative. Basic conditions are necessary (pH 8.45), and this, together with labelling experiments, suggests a mechanism involving NO attack on a co-ordinated amide group.  

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Lewis Base complexes—Group V donor atoms... 

The interaction of hydrogen with shallow donors and shallow acceptors in silicon is a problem of particular current interest and controversy. In the case of group V donors or group III acceptors, the donor or acceptor... 

Group V Donors. Nitrosyl complexes. The new dark-brown complex [Rh(NO)-Cl(AsPh3)2] has been prepared ... 

Group V Donors. A general synthesis has been reported for cationic trialkyl phosphite complexes of a range of noble metals, including [Ag P(OR)3 4] ... 

Group V Donors. The known chemistry of gold nitrates is limited and generally... 

TETRACARBONYLIRON(0) COMPLEXES CONTAINING GROUP V DONOR LIGANDS... 

B. OTHER TETRACARBONYL (GROUP V DONOR LIGAND) IRON(O) COMPLEXES... 

Some complexes which satisfy this definition are dealt with elsewhere, however. Those with X or Y as the Group V donors P, As or Sb are dealt with in Chapter 14 of this volume. Those with X or Y = Hg are described in Chapter 11 and the Group IV donors Si, Ge, Sn and Pb are included in Chapter 12.2, With very few exceptions this means that the relevant X,Y combinations are pairs derived from nitrogen, oxygen, sulfur or selenium donor groups. However, some specific examples of these combinations also occur elsewhere in this work. Amino acids (generally N—O bidentates) are covered in Chapter 20.2, Schiff base ligands (N—O or N—S) in Chapter 20.1, and several S—O... 

Group V Donors. N-Donor ligands. The photochemistry of the complexes [RuX2-(NH3)4]+ (X = Cl, Br, or I) has been studied in aqueous solution.77 Whereas the... 

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