| 摘要 |
The present invention relates to compounds of the formula (I): where M<SUP>1 </SUP>is an element of group 3, 4, 5 or 6 of the Periodic Table, X are halogen, hydrogen, C<SUB>1</SUB>-C<SUB>20</SUB>-alkyl, C<SUB>2</SUB>-C<SUB>20</SUB>-alkenyl, C<SUB>6</SUB>-C<SUB>22</SUB>-aryl, alkylaryl or arylalkyl, n is a natural number from 1 to 4. R<SUP>1 </SUP>is hydrogen or a C<SUB>1</SUB>-C<SUB>40 </SUB>radical, R<SUP>2 </SUP>is a substituted or unsubstituted C<SUB>6</SUB>-C<SUB>40</SUB>-aryl radical or C<SUB>2</SUB>-C<SUB>40</SUB>-heteroaromatic radical containing at least one heteroatom, R<SUP>3 </SUP>is hydrogen or a C<SUB>1</SUB>-C<SUB>40 </SUB>radical, or the radicals R<SUP>2 </SUP>and R<SUP>3 </SUP>together form a ring system, R<SUP>4 </SUP>is hydrogen or a C<SUB>1</SUB>-C<SUB>40 </SUB>radical, R<SUP>5 </SUP>is a C<SUB>1</SUB>-C<SUB>40 </SUB>radical, and Z is a divalent group CR<SUP>8</SUP>R<SUP>9</SUP>-CR<SUB>10</SUB>R<SUP>11</SUP>, where R<SUP>8</SUP>, R<SUP>9</SUP>, R<SUB>10 </SUB>and R<SUP>11 </SUP>are hydrogen or a C<SUB>1</SUB>-C<SUB>40 </SUB>radical. |
