An electrochemical and Raman spectroscopic study on polyaniline consisting of 1,4iminophenylene (IP, -NHC6H4-) and nitrilo-2,5-cyclohexadiene-l,4-diylidenenitrilo-l,4-phenylene (NP, -N= CeH4=NCeH4-) units has proved that the NP part is electrochemically inactive in nonaqueous electrolytes in spite of its conjugated structure of single and double bonds. The IP part can be doped but the doped regions of polyaniline with more NP content are less uniform and have larger bond orders. Increase in the NP content decreases electrical conductivity and discharged capacity of polyaniline. Hence, polyaniline containing the NP structure is not suitable for the positive electrode material of a rechargeable lithium battery.

When a large excess of EtOCONCS is added to Pd(0) complexes in the presence of PPh3 (Et = C2HS, Ph = C6H,), a compound of composition Pd(S2CNCOOEt)(PPh3), is isolated. On the basis of an x-ray diffraction study the compound is shown to be bis(triphenylphosphine)(N-ethoxycarbonyldithiocarbimato)palladium(II).The compound crystallizes in space group C,'-P1 of the triclinic system with two molecules in a unit cell of dimensions a = 13.371 (2) A, b = 13.741 (3) A, c = 10.995 (2) A, a = 93.85 (I)", = 113.74 (l)', y = 95.30 (l)", and V = 1829 A3. The structure has been solved by the heavy-atom method and refined by full-matrix least-squares techniques to a final value of the conventional R index on Fo of 0.042 based on 5794 unique reflections having F: 1 3u(FO2) collected by counter methods. The Pd atom is coordinated to two P atoms from the PPh3 groups and to two S atoms of the S,C=NCOOEt dithiocarbimato ligand in approximately a square-planar fashion. The Pd-P distances are 2.306 (1) and 2.333 (1) A, and the Pd-S distances are 2.316 (1) and 2.343 (1) A. The S-Pd-S angle is 75.03 (4)', while the P-Pd-P angle is 98.89 (4)". All five atoms in the inner coordination sphere are within 0.1 8, of the best least-squares plane defined by these atoms. The S-C bond lengths are 1.742 (4) and 1.754 (4) A and the C-N bond length is 1.282 (5) A. The comparable parameters within the inner coordination sphere agree very well with those found in the bis(N-cyanodithiocarbimato)nickelate(II) anion. In addition, these parameters differ but little from those of typical dithiocarbamate complexes.

Rhodium Carbene Complexes. The Structure of RhCl(C2H5OCONCS)3(P(C6H5)3)2 and the Synthesis and

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