Rabbit Anti-Human SNPH (a.a. 231-330) Polyclonal antibody

The pentahydride IrH5(PPh(3))(2) reacts with chelating silanes with loss of H-2 to form the classical seven-coordinate distorted pentagonal bipyramidal silyl polyhydride complexes IrH3(disil)(PPh(3))(2)(disil: dmsb, 3a; tids, 3b) with monodentate silanes to give IrH4(SiR(3))(PPh(3))(2)(R: Et, 4a; Ph, 4b) and with triphenyltin hydride to give IrH3(SnPh(3))(2)(PPh(3))(2) (5), all rare examples of Ir(V). A crystal structure was obtained for 3a. Crystal data: orthorhombic;space group Pbca (No. 61); a = 17.1534(6) Angstrom; b = 25.688(2) Angstrom; c = 19.0641(9) Angstrom; V = 8400(1) Angstrom(3); Z = 8.

The series of compounds mu,mu'-M(B5H8)(2), where M = Cd (I), Zn (II), or Hg (III), has been prepared from the reaction between K(B5H8) and the metal chloride in THF at low temperatures. The species were characterized by multinuclear NMR spectroscopy, elemental analysis and mass spectrometry. The NMR spectral assignments were confirmed using B-11{H-1} selective decoupling experiments and heteronuclear B-11-H-1 chemical shift correlation spectroscopy. The results appeared to be in conflict with the earlier assignment of the B-11-NMR spectra for 2,3-mu -metalloderivatives of pentaborane(9) which appear in the literature. For systems with an electrophilic group replacing a bridging H atom in B5H9, the B atoms most shifted in the B-11-NMR spectrum, which appear at the lower field, were assigned to the ones closest to the metal group. Our results for I-m suggested that the assignment was reversed, that is the higher held resonance is the one closest to the metal group. Thus, we reexamined the spectra of a series of related compounds including 2,3-mu -SnPPh3(B5H8), mu,mu'-SnPh2(B5H8), mu ,1'-SnPh2(B5H8), other Sn species and 2,3-mu -Cu(dppe)B5H8. In all cases our assignments were in accord with those for I-III and we suggest that this is general for all such B5H9 derivatives. (C) 2000 Elsevier Science B.V. All rights reserved.