Abstract: 1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene are produced by (a) reacting naphthalene with a halogen, (b) optionally, separating 1,4-dihalogen naphthalene or 1,5-dihalogen naphthalene from the mixture from step (a), and (c) reacting the mixture from step (a) or the 1,4-dihalogen naphthalene or the 1,5-dihalogen naphthalene from step (b) with ammonia and/or an organic amine in the presence of a catalyst.

Abstract: 1,4-diaminonaphthalene and/or 1,5-diaminonaphthalene are produced by (a) reacting naphthalene with a halogen, (b) optionally, separating 1,4-dihalogen naphthalene or 1,5-dihalogen naphthalene from the mixture from step (a), and (c) reacting the mixture from step (a) or the 1,4-dihalogen naphthalene or the 1,5-dihalogen naphthalene from step (b) with ammonia and/or an organic amine in the presence of a catalyst.

Abstract: Polyurethane prepolymers and polyurethane elastomers based on 1,4-naphthalene are described. Methods of preparing the polyurethane prepolymers and elastomers are also described. Molded articles capable of withstanding high mechanical stresses, prepared from the polyurethane prepolymers and/or polyurethane elastomers of the present invention, are further described.

Abstract: The present invention relates to a process to prepare an olefin using a transition metal compound of the formula I as a catalyst component where M1 is a metal of group IIIb, IVb or Vb of the Periodic Table of the Elements, R1, R2, R3 and R4 are identical or different and are each a hydrogen atom or a substituent, R5 are identical or different and are a substituent, Y are identical or different and are each a hydrogen atom, a C1-C40-hydrocarbon-containing group, an OH group, a halogen atom or an NR52 group, where R5 are identical or different and are each a halogen atom, a C1-C10-alkyl group or a C6-C10-aryl group, k is an integer which corresponds to the valence of the transition metal atom M1 minus two and if Y is a butadiene unit, k is 1, A is a bridge.

Abstract: The present invention relates to a transition metal compound of the formula I ##STR1## where M.sup.1 is a metal of group IIIb, IVb or Vb of the Periodic Table of the Elements,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and are each a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.40 -hydrocarbon-containing group, an --SiR.sup.5.sub.3, --NR.sup.5.sub.2, --Si(OR.sup.5).sub.3, --Si(SR.sup.5).sub.3 or --PR.sup.5.sub.2 radical, where R.sup.5 are identical or different and are each a halogen atom, a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.10 -aryl group, or two or more radicals R.sup.1, R.sup.2, R.sup.3 or R.sup.4 together with the atoms connecting them form a ring system,Y are identical or different and are each a hydrogen atom, a C.sub.1 -C.sub.40 -hydrocarbon-containing group, an OH group, a halogen atom or an NR.sup.5.sub.2 group,k is an integer which corresponds to the valence of the transition metal atom M.sup.1 minus two and if Y is a butadiene unit, k is 1,A is a bridge,R.