The complexes [Pt(L)Cl](2) (1), Pt(L)(HL)Cl (2), (two conformers, 2a and 2b), Pt(L)(Ph(3)P)Cl (3), Pt(L)(S,5-Me(2)-py)Cl (4) and Pt(L)(CO)CI (5) (HL = 7-chloro-1,3-dihydro-1-methyl-5-phenyl-2H-1,4-benzodiazepin-2-one, DIAZEPAM) have been prepared and characterized by IR, MS and H-1, C-13, P-31, and two-dimensional correlation NMR spectra. Complexes 1-5 contain a deprotonated DIAZEPAM coordinated to the metal through the N(4) atom and the ortho-carbon of the 5-phenyl substituent. In complex 2, as shown by a single crystal X-ray structure determination, carried out on conformer 2a, in addition to the cyclometallated system, a neutral molecule of DIAZEPAM is coordinated through the N(4) atom. The crystals of compound 2a, C32H25Cl3N4O2Pt, are monoclinic, space group P2(1)/n with a = 13.601(3), b = 15.951(5), c = 13.837(3) Angstrom, beta = 96.38(2)degrees, Z = 4. The structure was refined to R = 0.021 and R(w) = 0.032 on the basis of 4922 unique reflections with I>3 sigma(I). The platinum atom is in a square planar geometry with the carbon atom trans to the chloride ligand: Pt-C = 1.983(3), Pt-Cl = 2.402(1), Pt-N = 2.031(3) and 2.009(3) Angstrom.

CYCLOMETALATED DERIVATIVES OF PLATINUM(II) DERIVED FROM 1,4-BENZODIAZEPIN-2-ONES - CRYSTAL AND MOLECULAR-STRUCTURE OF PT(L)(HL)CL (HL=7-CHLORO-1,3-DIHYDRO-1-METHYL-5-PHENYL-2H-1,4-BENZODIAZEPIN-2-ONE, DIAZEPAM), A MOLECULE CONTAINING A NEUTRAL AND A DEPROTONATED 1,4-BENZODIAZEPIN-2-ONE / Stoccoro, Sergio; Cinellu, Maria Agostina; Zucca, A; Minghetti, G; Demartin, F.. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 215:1-2(1994), pp. 17-26. [10.1016/0020-1693(93)03699-B]

CYCLOMETALATED DERIVATIVES OF PLATINUM(II) DERIVED FROM 1,4-BENZODIAZEPIN-2-ONES - CRYSTAL AND MOLECULAR-STRUCTURE OF PT(L)(HL)CL (HL=7-CHLORO-1,3-DIHYDRO-1-METHYL-5-PHENYL-2H-1,4-BENZODIAZEPIN-2-ONE, DIAZEPAM), A MOLECULE CONTAINING A NEUTRAL AND A DEPROTONATED 1,4-BENZODIAZEPIN-2-ONE

STOCCORO, Sergio;CINELLU, Maria Agostina;ZUCCA A;
1994-01-01

Abstract

The complexes [Pt(L)Cl](2) (1), Pt(L)(HL)Cl (2), (two conformers, 2a and 2b), Pt(L)(Ph(3)P)Cl (3), Pt(L)(S,5-Me(2)-py)Cl (4) and Pt(L)(CO)CI (5) (HL = 7-chloro-1,3-dihydro-1-methyl-5-phenyl-2H-1,4-benzodiazepin-2-one, DIAZEPAM) have been prepared and characterized by IR, MS and H-1, C-13, P-31, and two-dimensional correlation NMR spectra. Complexes 1-5 contain a deprotonated DIAZEPAM coordinated to the metal through the N(4) atom and the ortho-carbon of the 5-phenyl substituent. In complex 2, as shown by a single crystal X-ray structure determination, carried out on conformer 2a, in addition to the cyclometallated system, a neutral molecule of DIAZEPAM is coordinated through the N(4) atom. The crystals of compound 2a, C32H25Cl3N4O2Pt, are monoclinic, space group P2(1)/n with a = 13.601(3), b = 15.951(5), c = 13.837(3) Angstrom, beta = 96.38(2)degrees, Z = 4. The structure was refined to R = 0.021 and R(w) = 0.032 on the basis of 4922 unique reflections with I>3 sigma(I). The platinum atom is in a square planar geometry with the carbon atom trans to the chloride ligand: Pt-C = 1.983(3), Pt-Cl = 2.402(1), Pt-N = 2.031(3) and 2.009(3) Angstrom.
1994
CYCLOMETALATED DERIVATIVES OF PLATINUM(II) DERIVED FROM 1,4-BENZODIAZEPIN-2-ONES - CRYSTAL AND MOLECULAR-STRUCTURE OF PT(L)(HL)CL (HL=7-CHLORO-1,3-DIHYDRO-1-METHYL-5-PHENYL-2H-1,4-BENZODIAZEPIN-2-ONE, DIAZEPAM), A MOLECULE CONTAINING A NEUTRAL AND A DEPROTONATED 1,4-BENZODIAZEPIN-2-ONE / Stoccoro, Sergio; Cinellu, Maria Agostina; Zucca, A; Minghetti, G; Demartin, F.. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 215:1-2(1994), pp. 17-26. [10.1016/0020-1693(93)03699-B]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/49321
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