Aluminum alkyl complexes containing guanidinate ligands

Sarah L. Aeilts, Martyn P. Coles, Dale C. Swenson, Richard F. Jordan, Victor G Young

Research output: Contribution to journalArticle

112 Scopus citations

Abstract

The synthesis and structures of new aluminum complexes incorporating guanidinate ligands (R2NC(NR′)2-) are described. The reaction of 1PrN=C=NiPr with LiNR2 reagents yields Li[R2NC(NiPr)2] guanidinate salts, which are reacted in situ with AlCl3 or AlMe2Cl to afford {R2NC(NiPr)2}AlCl2 (1a, R = Me; 1b, R = Et; 1c, R = iPr; 1d, R = SiMe3) or {R2NC(NiPr)2}AlMe2 (2a, R = Me; 2b, R = Et; 2c, R = iPr), respectively. The reaction of 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-α]pyrimidine (hppH) with AlMe3 generates {(μ-hpp)-AlMe2}2 (3). Complexes 1a, 1d, and 3 have been characterized by X-ray crystallography. 1a and 1d adopt monomeric structures with symmetric chelated bidentate guanidinate ligands. Delocalization of the -NR2 lone pair into the chelate ring is important for 1a but not for 1d, due to N-Si π-bonding and steric crowding. The bicyclic structure of the hpp- ligand enforces a dimeric μ-hpp- structure for 3.

Original languageEnglish (US)
Pages (from-to)3265-3270
Number of pages6
JournalOrganometallics
Volume17
Issue number15
DOIs
StatePublished - Jul 20 1998

Fingerprint Dive into the research topics of 'Aluminum alkyl complexes containing guanidinate ligands'. Together they form a unique fingerprint.

  • Cite this

    Aeilts, S. L., Coles, M. P., Swenson, D. C., Jordan, R. F., & Young, V. G. (1998). Aluminum alkyl complexes containing guanidinate ligands. Organometallics, 17(15), 3265-3270. https://doi.org/10.1021/om980223m