Biomedical subjects

Sandro Gambarotta

Publications and source records attributed to Sandro Gambarotta.

21 records · Page 2Linked to original sources

PubMed1997

Preparation and Characterization of a Diamagnetic Sulfido-Bridged Divanadium Amide Complex.

Reaction of [(Me(3)Si)(2)N](2)VCl(THF) with S(8) led to the formation of the dinuclear and diamagnetic complex {[(Me(3)Si)(2)N](2)V}(2)(&mgr;-S)(2) (1), whose connectivity was elucidated by an X-ray crystal structure. Ab initio theoretical calculations carried out on both complex 1 and the isostructural oxo-bridged dimer indicated a determinant participation of the bridging atoms in the formation of V-V bonds. Crystal data for 1 are as follows: C(24)H(72)N(4)Si(8)V(2)S(2), fw 807.54, monoclinic P2(1)/c, a = 9.1386(2) Å, b = 14.5955(3) Å, c = 34.8578(6) Å, beta = 95.744(1) degrees, V = 4626.1(1) Å(3), Z = 4, T = -153 degrees C.

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PubMed1997

Preparation and Characterization of a Diamagnetic and Dinuclear Titanium(III) Formamidinate Complex. Evidence for the Existence of a Ti-Ti Bond?

The new diamagnetic Ti(III) complex (CyNC(H)NCy)(4)Ti(2)Cl(2).2THF (1) containing a short Ti-Ti distance was prepared and crystallographically characterized. Ab initio unrestricted Hartree-Fock calculations suggested the presence of a Ti-Ti bonding interaction. Crystal data for 1 are as follows: C(60)H(108)N(8)Ti(2)Cl(2)O(2), FW 1140.27, monoclinic Pn, a = 10.4688(9) Å, b = 14.4579(9) Å, c = 21.421(1) Å, beta = 100.227(9) degrees, V = 3190.6(7) Å(3), Z = 2, D(calc) = 1.187 g/cm(3), F(000) = 1236, &mgr; = 3.75 cm(-)(1), T = -158 degrees C, R = 0.074, R(w) = 0.075, GOF = 3.64 for 540 parameters and 4630 reflections out of 5771 unique reflections observed.

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PubMed1997

Preparation and Characterization of a Homoleptic Vanadium(III) Amide Complex and Its Transformation into Terminal Chalcogenide Derivatives [(3,5-Me(2)Ph)AdN](3)V=E (E = S, Se; Ad = Adamantyl).

Reaction of VCl(3)(THF)(3) with (3,5-Me(2)Ph)AdNLi.Et(2)O (Ad = adamantyl) yields the homoleptic vanadium complex [(3,5-Me(2)Ph)AdN](3)V (1), which reacts with chalcogens E (E = S, Se) to yield diamagnetic terminal chalcogenide derivatives [(3,5-Me(2)Ph)AdN](3)V=E [E = S (3a), Se (3b)] Crystal data for 1 and 3a are as follows. 1: C(54)H(72)N(3)V, fw 814.09, triclinic P&onemacr;, a = 10.441(1) Å, b = 11.648(4) Å, c = 19.321(2) Å, alpha = 83.69(2) degrees, beta = 83.89(1) degrees, gamma = 82.42(2) degrees, Z = 2. 3a: C(54)H(72)N(3)VS.(1)/(2)Et(2)O, fw 883.25, monoclinic C2/c, a = 43.400(9) Å, b = 11.744(3) Å, c = 20.705(4) Å, beta = 113.05(1) degrees, Z = 8.

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