Patent ID: 6423659
Filing Date: 2002-07-23
Classification: C07F,C08F,Y10S

Abstract:
A &pgr;-complex compound comprising the formula wherein&pgr;I and &pgr;II represent &pgr; systems which bear charges which are different from each other or which are electrically neutral, and which can be singly- or doubly-condensed with unsaturated or saturated five- or six-membered rings, D denotes a donor atom which is a substituent of &pgr;I or is part of the &pgr; system of &pgr;I, and which has at least one free electron pair available in its respective bonding state, A denotes an acceptor atom which is a substituent of &pgr;II or is part of the &pgr; system of &pgr;II, and which has an electron pair vacancy in its respective bonding state, wherein D and A are linked by a reversible coordinate bond in such a way that the donor group assumes a positive (partial) charge and the acceptor group assumes a negative (partial) charge, and wherein at least one of D and A is part of the associated &pgr; system in each case, wherein D and A themselves may comprise substituents, wherein each &pgr; system or each condensed-on ring system can contain one or more D or A entities, or D and A entities, and wherein in &pgr;I and &pgr;II, in the non-condensed or in the condensed form, one to all of the H atoms of the &pgr; system, independently of each other, can be substituted by identical or different radicals from the group comprising a linear or branched C1-C20 alkyl which can be substituted singly to completely by halogens, can be substituted singly to three-fold by phenyl or can be substituted singly to three-fold by vinyl; a C6-C12 aryl, and a halogenoaryl comprising 6 to 12 C atoms; and said H atoms can also be singly- or doubly-substituted by D and A, so that the reversible coordinate Dâ†’A bond is formed (i) between D and A, which both constitute parts of the respective &pgr; system, or (ii) from the D or A part of the &pgr; system and the other substituent of the non-condensed &pgr; system or of the condensed-on ring system in each case, or (iii) both D and A are such substituents, wherein in the case of (iii) at least one additional D or A entity or both is (are) part of the &pgr; system or of the condensed-on ring system, M represents a transition metal of subgroups III, IV, V or VI of the periodic table of the elements (Mendeleev, including the lanthanides and actinides), X denotes an anion equivalent, and n denotes the numbers zero, one, two, three or four depending on the charge of M and on those of &pgr;I and &pgr;II.