Abstract
New chiral peralkyldiphosphines (S,S)-2,2″-bis[(R)-1-(dialkylphosphino)ethyl]-1,1″-biferrocenes ((R,R)-(S,S)-al-kylTRAPs) were synthesized from (R)-N,N-dimethyl-1-ferrocenylethylamine in four steps in 38-68% overall yields (MeTRAP: 38%, EtTRAP: 68%, PrTRAP: 53%, BuTRAP: 56%, i-BuTRAP: 51%, i-PrTRAP: 42%). The reactions of alkylTRAP (Et-, Bu-, i-Bu, and i-PrTRAP) with 1 molar amount Of PdBr2 gave tran-[PdBr2(alkylTRAP)] in good yields. The X-ray crystal structures of these palladium complexes revealed that alkylTRAPs coordinated to a palladium atom in a trans-chelating manner regardless of the P-alkyl substituents. The structures of palladium complexes of Et-, Bu-, and i-PrTRAP had nearly C2-symmetry, but that of i-BuTRAP was deviated from C2-symmetry significantly. AlkylTRAPs also reacted with [PtCl2(MeCN2] and [RhCl(CO2]2, giving the corresponding trans-chelate platinum and rhodium complexes. The crystal structure of tran [RhCl(CO)(BuTRAP)] revealed that the conformation of the BuTRAP ligand in the complex was almost the same as that in the palladium complex trans-[PdBr2(BuTRAP)].
| Original language | English |
|---|---|
| Pages (from-to) | 2807-2822 |
| Number of pages | 16 |
| Journal | Bulletin of the Chemical Society of Japan |
| Volume | 70 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Jan 1 1997 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
Cite this
Trans-Chelating Chiral Peralkyldiphosphine Ligands (R,R) -(S,S)-2,2″-Bis[1-(dialkylphosphino)ethyl]-1,1″-biferrocenes (AlkyITRAPs) and Their Transition Metal Complexes. / Kuwano, Ryoichi; Sawamura, Masaya; Okuda, Satoshi; Asai, Tomohito; Ito, Yoshihiko; Redon, Martine; Krieff, Alain.
In: Bulletin of the Chemical Society of Japan, Vol. 70, No. 11, 01.01.1997, p. 2807-2822.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Trans-Chelating Chiral Peralkyldiphosphine Ligands (R,R) -(S,S)-2,2″-Bis[1-(dialkylphosphino)ethyl]-1,1″-biferrocenes (AlkyITRAPs) and Their Transition Metal Complexes
AU - Kuwano, Ryoichi
AU - Sawamura, Masaya
AU - Okuda, Satoshi
AU - Asai, Tomohito
AU - Ito, Yoshihiko
AU - Redon, Martine
AU - Krieff, Alain
PY - 1997/1/1
Y1 - 1997/1/1
N2 - New chiral peralkyldiphosphines (S,S)-2,2″-bis[(R)-1-(dialkylphosphino)ethyl]-1,1″-biferrocenes ((R,R)-(S,S)-al-kylTRAPs) were synthesized from (R)-N,N-dimethyl-1-ferrocenylethylamine in four steps in 38-68% overall yields (MeTRAP: 38%, EtTRAP: 68%, PrTRAP: 53%, BuTRAP: 56%, i-BuTRAP: 51%, i-PrTRAP: 42%). The reactions of alkylTRAP (Et-, Bu-, i-Bu, and i-PrTRAP) with 1 molar amount Of PdBr2 gave tran-[PdBr2(alkylTRAP)] in good yields. The X-ray crystal structures of these palladium complexes revealed that alkylTRAPs coordinated to a palladium atom in a trans-chelating manner regardless of the P-alkyl substituents. The structures of palladium complexes of Et-, Bu-, and i-PrTRAP had nearly C2-symmetry, but that of i-BuTRAP was deviated from C2-symmetry significantly. AlkylTRAPs also reacted with [PtCl2(MeCN2] and [RhCl(CO2]2, giving the corresponding trans-chelate platinum and rhodium complexes. The crystal structure of tran [RhCl(CO)(BuTRAP)] revealed that the conformation of the BuTRAP ligand in the complex was almost the same as that in the palladium complex trans-[PdBr2(BuTRAP)].
AB - New chiral peralkyldiphosphines (S,S)-2,2″-bis[(R)-1-(dialkylphosphino)ethyl]-1,1″-biferrocenes ((R,R)-(S,S)-al-kylTRAPs) were synthesized from (R)-N,N-dimethyl-1-ferrocenylethylamine in four steps in 38-68% overall yields (MeTRAP: 38%, EtTRAP: 68%, PrTRAP: 53%, BuTRAP: 56%, i-BuTRAP: 51%, i-PrTRAP: 42%). The reactions of alkylTRAP (Et-, Bu-, i-Bu, and i-PrTRAP) with 1 molar amount Of PdBr2 gave tran-[PdBr2(alkylTRAP)] in good yields. The X-ray crystal structures of these palladium complexes revealed that alkylTRAPs coordinated to a palladium atom in a trans-chelating manner regardless of the P-alkyl substituents. The structures of palladium complexes of Et-, Bu-, and i-PrTRAP had nearly C2-symmetry, but that of i-BuTRAP was deviated from C2-symmetry significantly. AlkylTRAPs also reacted with [PtCl2(MeCN2] and [RhCl(CO2]2, giving the corresponding trans-chelate platinum and rhodium complexes. The crystal structure of tran [RhCl(CO)(BuTRAP)] revealed that the conformation of the BuTRAP ligand in the complex was almost the same as that in the palladium complex trans-[PdBr2(BuTRAP)].
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U2 - 10.1246/bcsj.70.2807
DO - 10.1246/bcsj.70.2807
M3 - Article
VL - 70
SP - 2807
EP - 2822
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 11
ER -