Metallic macrocycle with a 1,3-alternate calix[4]arene phosphorus ligand

Sanghoon Kim; Jong Seung Kim; Ok Jae Shon; Shim Sung Lee; Ki-Min Park; Sang Ook Kang; Jaejung Ko

doi:10.1021/ic030221g

Metallic macrocycle with a 1,3-alternate calix[4]arene phosphorus ligand

Inorg Chem. 2004 May 3;43(9):2906-13. doi: 10.1021/ic030221g.

Authors

Sanghoon Kim¹, Jong Seung Kim, Ok Jae Shon, Shim Sung Lee, Ki-Min Park, Sang Ook Kang, Jaejung Ko

Affiliation

¹ Department of Chemistry, Korea University, Chochiwon, Chungnam 339-700, Korea.

PMID: 15106978
DOI: 10.1021/ic030221g

Abstract

The preparation of an 1,3-alternate calix[4]arene phosphorus ligand, 25,27-bis(2-(diphenylphosphino)ethoxy)-26,28-bis(1-propyloxy)calix[4]arene (3), is presented. Ligand 3 is obtained in three steps in 64% overall yield. Reaction of 3 with [Rh(cot)2]BF4 produced the encapsulated rhodium complex [Rh[(P,P)-diphen-calix[4]arene]]BF4 (4). As revealed by a single-crystal X-ray diffraction study, the rhodium center has a bent coordination environment with a P-Rh-P angle of 135.66(3) degrees. Palladation of 3 employing [Pd(MeCN)4](BF4)2 yielded the chelate palladium complex 7 in which the palladium center has a slightly bent configuration. Treatment of the ligand with Pd(cod)Cl2 and [Pd(eta3-C4H7)(THF)2]BF4 leads to the isolation of the monometallic complex. Full characterization includes X-ray structural studies of compounds 3, 4, and 6.