YlideneIminophosphine Coordination Complexes and Reversible Dissociation of Dichlorophosphetidines
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- 作者：Neil Burford ; C. Adam Dyker ; Andrew D. Phillips ; Heather A. Spinney ; Andreas Decken ; Robert McDonald ; Paul J. Ragogna ; and Arnold L. Rheingold
- 刊名：Inorganic Chemistry
- 出版年：2004
- 出版时间：November 15, 2004
- 年：2004
- 卷：43
- 期：23
- 页码：7502 - 7507
- 全文大小：113K
- 年卷期：v.43,no.23(November 15, 2004)
- ISSN：1520-510X
文摘
Chloro-, bromo-, iodo-, and trifluoromethylsulfonyloxy-(2,4,6-tri-tert-butylphenylimino)phosphines (Mes*NPX; X =Cl, Br, I, OTf) react quantitatively with 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (Im) to give Lewis acid-basecomplexes with the general formula Mes*NP(Im)X. The dichlorophosphetidine (DippNPCl)2 (Dipp = 2,6-diisopropylphenyl) represents a formal cyclodimer of an iminophosphine and reacts with Im to give a similar complex.The process represents a ligand induced dissociation of the phosphetidine framework and is reversed by theintroduction of an appropriate Lewis acid. Solid state structures of RNP(Im)X complexes show that the closestcontact between acid and base occurs between phosphorus and carbon in all cases, highlighting them as compoundsthat contain examples of C
P coordinate bonds. Association of Im with phosphorus also effects a substantialincrease in the P-X distance, but all derivatives maintain a short NP bond, indicating the presence of NP 
-bonding.
P coordinate bonds. Association of Im with phosphorus also effects a substantialincrease in the P-X distance, but all derivatives maintain a short NP bond, indicating the presence of NP -bonding.