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Keywords = bisphosphinimine

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8 pages, 1182 KB  
Short Note
Trichloro[2,5-bis[N-(4-isopropylphenyl)-P,P-diisopropylphosphorimidoyl-κN]pyrrole-κN]zirconium(IV)·Benzene
by Thamara V. Salazar-Barrientos, Christopher P. Forfar and Paul G. Hayes
Molbank 2025, 2025(4), M2090; https://doi.org/10.3390/M2090 - 14 Nov 2025
Viewed by 303
Abstract
A new zirconium trichloride complex, supported by a monoanionic, pyrrole-based bisphosphinimine NNN-pincer ligand, [LZrCl3] (L = 2,5-[iPr2P=N(4-iPrC6H4)]2NH(C6H2) (1), is reported. Comparison with [...] Read more.
A new zirconium trichloride complex, supported by a monoanionic, pyrrole-based bisphosphinimine NNN-pincer ligand, [LZrCl3] (L = 2,5-[iPr2P=N(4-iPrC6H4)]2NH(C6H2) (1), is reported. Comparison with a related iminopincer complex reveals significant differences in bond lengths and angles between the atoms around the metal centre, largely due to the more electron donating phosphinimine (R3P=NR (R = alkyl, aryl)) functionality. The P=N bonds in complex (1•benzene) are longer than in the proteo ligand HL (L = 2,5-[Ph2P=N(4-iPrC6H4)]2NH(C6H2)), which is consistent with phosphinimine coordination to a metal. This is the only reported zirconium complex with this specific ligand scaffold; no analogous complexes have been reported for other group 4 metals. This structure expands the library of Zr pincer complexes that bear tridentate ligand frameworks and sets the stage for the preparation of related complexes. Full article
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7 pages, 862 KB  
Short Note
Dichloro[2,5-bis(diisopropylphosphorimidoyl-κN-(4,6-dimethylpyrimidine-κN))pyrrole-κN]yttrium(III)·toluene
by Emily L. Trew, David Szucs and Paul G. Hayes
Molbank 2025, 2025(4), M2066; https://doi.org/10.3390/M2066 - 30 Sep 2025
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Abstract
The compound dichloro[bis(diisopropylphosphorimidoyl-κN-(4,6-dimethylpyrimidine-κN))pyrrole-κN]yttrium(III) was synthesized from one equivalent of NaL [L = 2,5-[iPr2P=N(PymMe)]2NH(C4H2); PymMe = 4,6-dimethylpyrimidine] and YCl3(THF)3.5 and crystallized from [...] Read more.
The compound dichloro[bis(diisopropylphosphorimidoyl-κN-(4,6-dimethylpyrimidine-κN))pyrrole-κN]yttrium(III) was synthesized from one equivalent of NaL [L = 2,5-[iPr2P=N(PymMe)]2NH(C4H2); PymMe = 4,6-dimethylpyrimidine] and YCl3(THF)3.5 and crystallized from toluene. X-ray quality crystals of LYCl2 were obtained with one toluene solvent molecule in the asymmetric unit. The geometry, bond lengths and angles were analyzed and found to contain similar parameters to comparable structures in the literature, and the product was further characterized by NMR spectroscopy. To the best of our knowledge, this is the first reported seven-coordinate Y(III) complex supported by a pentadentate ligand wherein all five donor atoms are nitrogen. Full article
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