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(M = Cr, Mo, W) On Complexes of the Type

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Uber Komplexe des Typs {(PhC ¨

C)

3

P}

3

M(CO)

3

(M = Cr, Mo, W) On Complexes of the Type

f

(PhC

C)

3

P

g3

M(CO)

3

(M = Cr, Mo, W)

Norbert Kuhn, Martin G¨ohner und Manfred Steimann

Institut f¨ur Anorganische Chemie der Universit¨at T¨ubingen, Auf der Morgenstelle 18, D-72076 T¨ubingen

Sonderdruckanforderungen an Prof. Dr. N. Kuhn. E-mail: kuhn@uni-tuebingen.de Herrn Prof. Dr. Manfred Regitz zum 65. Geburtstag gewidmet

Z. Naturforsch.56 b,95–99 (2001); eingegangen am 22. September 2000 Chromium, Molybdenum, Tungsten

The tris(alkinyl)phosphine complexesf(PhCC)3Pg3M(CO)3, M = Cr (3a), Mo (3b), W (3c), are obtained from P(CCPh)3and (C6H15N3)M(CO)3(C6H15N3= 1,3,5-trimethyl-1,3,5- triazacyclohexane) as stable yellow solids in good yields. While IR data indicate significant acceptor properties of the phosphane ligands, the X-ray structure analysis of3calso allows the discussion of weak donor interactions.

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