The chemistry of Cp* based κ2-N,S-chelated ruthenium complex, [Cp*RuPPh3(κ2-N,S-(NC7H4S2)], 1 with different boranes has been explored. Room temperature reaction of 1 with BH3·THF and bulky boranes, such as, MesBH2 and...

We have recently reported the perchlorinated diniobaborane species [(Cp*Nb)2(B2H4Cl2)2] from [(Cp*Nb)2(B2H6)2] using CCl4 as chlorinating agent. In an attempt to isolate the vanadium analogue, we have isolated [(Cp*V)2(B2H6)2], 1 from the reaction of (Cp*VCl2)3 with [LiBH4•THF] followed by thermolysis with excess [BH3•THF]. Subsequently, the thermolysis of 1 with CCl4 for a prolonged period of time afforded perchlorinated divanadaborane [(Cp*V)2(B2H4Cl2)2], 2 along with the formation of bichlorinated divanadaborane [(Cp*V)2(B2H5Cl)2], 3 and trichlorinated divanadaborane [(Cp*V)2(B2H4Cl2)(B2H5Cl)], 4. Similarly, in order to functionalize the terminal B-H by {SePh} group, thermolysis of 1 was carried out with Ph2Se2 that yielded persubstituted divanadaborane [(Cp*V)2{B2H4(SePh)2}2], 5 in parallel to the formation of [(Cp*V)2{B4H11(SePh)}], 6. Compound 5 is very fascinating in which all the terminal B-H hydrogens of 1 have been substituted by {SePh} ligands. All the compounds have been characterized by 1 H, 11 B, 13 C NMR spectroscopy; mass spectrometry; IR spectroscopy and single crystal X-ray analysis. Density functional theory (DFT) and TD-DFT calculations provided further understanding regarding the electronic structures, bonding and electronic transitions of these persubstituted vanadaborane species.

A new class of bi-luminophoric dyad has been designed, consisting of an oxygen-sensitive phosphorescent NHC-Ir center with a remotely integrated oxygen-insensitive fluorescent terpyridine unit. The new terpyridine flurophore-integrated NHC-Ir molecule was demonstrated as a potential ratiometric O probe with built-in internal reference, exhibiting tunable dual-emissive features, as well as highly linear and reversible O -response behavior.

Treatment of [(Dipp)NCMeCHCOMeGeN(SiMe3)2] with [Rh2Cl2(μ-Cl)2(η5-Cp*)2] and [Ir2Cl2(μ-Cl)2(η5-Cp*)2] led to cyclometallated complexes of Rh and Ir with deprotonation from the CH3 group in the germylene ligand.

The complexes [Ag{κ 3 -S,SЈ,H-H 2 B(mbz) 2 }(PR 3 )] x , (1: x = 2, R = Ph; 2: x = 1, R = Cy) (mbz = 2-mercaptobenzothiazolyl) and amidine based dihydro(2-mercaptobenzo-thiazolyl) borates, [HN=C(Ph)-NH(R)-H 2 B(mbz)] (3: R = 2,6-diisopropylphenyl and 4: R = Ph) were synthesized and characterized by various spectroscopic methods and single-crystal X-ray crystallography. Complex [Ag{κ 3 -S,SЈ,H-H 2 B(mbz) 2 }(PPh 3 )] 2 (1) has a dimeric structure in its crystalline state, in which central silver(I) atoms adopt a * Prof. Dr. S. Ghosh E-Mail: sghosh@iitm.ac.in [a] 588 distorted trigonal bipyramid arrangement. In contrast, complex [Ag{κ 3 -S,SЈ,H-H 2 B(mbz) 2 }(PCy 3 )] (2) has a monomeric structure in its crystalline state, in which the central silver(I) atoms adopt a distorted trigonal planar arrangement. Infrared spectroscopy was utilized as a tool for investigating the presence of M···H-B interactions. In addition, density functional theory (DFT) calculations were used to analyse the B-H···[M] bonding interaction in the metal borate complexes. Crystal Data for 1: C 64 H 50 B 2 Ag 2 S 8 N 4 P 2 , M r = 1430.86, triclinic, P1, a = 11.5839(8) Å, b = 11.6836(8) Å, c = 12.2097(9) Å, α = 76.233(6)°, β = 80.921(6)°, γ = 73.582(6)°, V = 1532.3(2) Å 3 , Z = 1, ρ calcd. = 1.551 mg·m -3 , μ = 1.009 mm -1 , F(000) = 724, R 1 = 0.0507, wR 2 = 0.0653, 7252 independent reflections [2θ Յ 58.48°] and 378 parameters, Goodness-of-fit on F 2 = 1.029. Crystal Data for 2: C 32 H 43 BAgS 4 N 2 P, M r = 733.57, monoclinic, P2 1 /n, a = 9.7847(3) Å, b = 25.6692(6) Å, c = 13.9303(4) Å, α = 90°, β = 99.334(3)°, γ = 90°, V = 3452.48(17) Å 3 , Z = 4, ρ calcd. = 1.411 mg·m -3 , μ = 0.897 mm -1 , F(000) = 1520, R 1 = 0.0574, wR 2 = 0.0979, 8391 independent reflections [2θ Յ 58.066°] and 378 parameters, Goodness-of-fit on F 2 = 1.034. Crystal Data for 3: C 26 H 30 BS 2 N 3 , M r = 457.44, monoclinic, P2 1 /n, a = 12.8305(5) Å, b = 14.3085(4) Å, c = 13.9844(4) Å, α = 90°, β = 98.940(3)°, γ = 90°, V = 2536.14(14) Å 3 , Z = 4, ρ calcd. = 1.198 mg·m -3 , μ = 0.228 mm -1 , F(000) = 968, R 1 = 0.1074, wR 2 = 0.1880, 8484 independent reflections [2θ Յ 64.764°] and 310 parameters, Goodness-of-fit on F 2 = 1.106. Crystal Data for 4: C 20 H 18 BS 2 N 3 , M r = 585.61, monoclinic, P2 1 /c, a = 9.9343(10) Å, b = 14.2927(17) Å, c = 23.194(3) Å, α = 90°, β = 92.483(4)°, γ = 90°, V = 3290.2(6) Å 3 , Z = 4, ρ calcd. = 1.182 mg·m -3 , μ = 0.192 mm -593 independent reflections [2θ Յ 50.998°] and 447 parameters, Goodness-of-fit on F 2 = 1.032.Supporting Information (see footnote on the first page of this article): Detailed information about the packing diagram of compounds 3 and 4, spectroscopic data and DFT-computed results for compounds 1, 2, 3 and 4 have been provided in the supporting information.