Indian Institute of Technology Hyderabad (IITH) is a premier institute of science and technology established in 2008. IITH has been consistently ranked in the&nbsp;<a href="https://iith.ac.in/reports/" rel="noopener noreferrer">top 10 institutes</a>&nbsp;in India for Engineering&nbsp;<a href="https://www.nirfindia.org/2021/EngineeringRanking.html" rel="noopener noreferrer" target="_blank">according to NIRF</a>&nbsp;making it one of the most coveted schools for science and technology in the country.

IITH offers&nbsp;<a href="https://iith.ac.in/academics/under-graduate/">undergraduate programs</a>&nbsp;in all the classical engineering disciplines, applied sciences, design, as well as several modern interdisciplinary areas. Students are given a flexibility to explore a broad set of areas, and potentially pursue a minor or double major in a discipline that is not their own. Students who wish to seek a deeper understanding of their own discipline are strongly encouraged to get involved in cutting-edge research with the help of a faculty to mentor them, and earn an Honors in their own field.

The very foundation of IIT Hyderabad is based on&nbsp;<a href="https://iith.ac.in/research/">research and innovation</a>. The vibrant research culture is evident from the number of patents and publications that IITH produces consistently every year. IITH offers&nbsp;<a href="https://iith.ac.in/academics/programmes-offered/">graduate programs</a>&nbsp;at both a masters, and a doctoral level, in several diverse areas. There are separate programs for technology, design, science, and liberal arts. The&nbsp;<a href="https://iith.ac.in/academics/post-graduate/">MTech program</a>&nbsp;is offered in various modes and durations to cater to the ever-growing need of postgraduate level professionals in the country.

IITH encourages and supports&nbsp;<a href="https://iic-iith.netlify.app/index.html" rel="noopener noreferrer" target="_blank">innovation and entrepreneurship</a>&nbsp;at every stage. The minor program in entrepreneurship is open to all students of IITH, and many of the courses are offered by industrialists who are entrepreneurs themselves. There are various&nbsp;<a href="https://iith.ac.in/research/centres-incubators/">innovation centers and incubators</a>&nbsp;that promote entrepreneurship and help mentor young innovators. IITH has been very successful in building tie-ups with leading academic institutions around the globe.

IITH enjoys a very special relationship with Japanese universities and industries that goes beyond academic and research collaborations. In fact, some of the iconic buildings in IITH campus will carry the signature of Japanese architecture.

IITH creates a unique holistic ecosystem for education that offers interactive learning, a very flexible academic structure, cutting-edge research, strong industry collaboration, and entrepreneurship. This is an environment which enables students and faculty to translate their dreams into realities.

IIT Hyderabad

The interaction of 3,5-diisopropylsalicylic acid (DIPSA) with [ nBu2Sn(O)] in benzene proceeds with elimination of water to produce stannoxane [nBu2Sn(3,5-iPr 2C6H2(O)(COO))]6 (1), while an analogous reaction of DIPSA with [nBuSn(O)(OH)] leads to the isolation of [nBuSn(O)(3,B-iPr2C 6H2(OH)(COO))]6 (2). The new products have been characterized by elemental analysis and EI-MS, IR, and NMR (1P, 13C, and 119Sn) spectroscopy. The molecular structure of 1 determined by single-crystal X-ray diffraction studies reveals a rare cyclic hexameric structure. The tin atoms are pentacoordinated with distorted trigonal-bipyramidal geometry. Complex 2 is also a hexameric cluster, but existing in a more common drum-like structure where the tin centers are hexacoordinated.

Department of Chemistry

World University root node

Organometallics

Hexameric organotincarboxylates with cyclic and drum structures

Unless kinetically stabilized, hydroxides of silicon are unstable and readily self-condense through elimination of water molecules to yield Si-O-Si siloxane linkages. The condensation reaction is known to be very facile in the presence of acids and bases. Stabilization of three hydroxyl groups on the same silicon in acidic or basic medium assumes importance, in view of their use in the rational synthesis of metallosilicates. In the present work, the first examples of a silanetriol stabilized in a matrix of aliphatic or aromatic diamines are described. The reactions of [2,6-Me 2C 6H 3N(SiMe 3)Si(OH) 3] (1b) with equimolar amounts of piperazine (PIP), 1,4-diazabicyclo [2,2,2] octane (DABCO), and 4,4′-bipyridine (BPY) yield [{2,6-Me 2C 6H 3N-(SiMe 3)Si(OH) 3}{PIP}] (2), [{2,6-Me 2C 6H 3N(SiMe 3)Si(OH) 3}{DABCO}{1,4-dioxane} 0.5] (3), and [{2,6-Me 2C 6H 3N(SiMe 3)Si(OH) 3}{BPY} 1.5] (4), respectively. These assemblies have been characterized by elemental analysis, IR and NMR 1H and 13C) spectroscopy, and single-crystal X-ray diffraction techniques. Apart from providing an insight into the association behavior of silicon polyhydroxides in basic medium, this study also offers clues for the stabilization of metastable orthosilicic acid, Si(OH) 4, in an organic soluble medium.

Stabilization of organosilanetriols in amine matrices: Trapping intermediates between RSi(OH) 3 and (RSiO 3) 3- anions

The tetranucleating manganese(III) and copper(II) complexes of the type Mn4LP2, Cu4LP2, where H6LP2 = 1,4 bis[2′- hydroxy-3′-(iminotetraphenylporphyrin)-5′-methylbenzyl] piperazine, were synthesized and characterized. Mn4LP2 complex is EPR silent and this indicates that manganese is in +3 oxidation state. Cu4LP2 complex showS broad band with g value centered at 2.06 indicates antiferromagnetic coupling. Cyclic voltammetry studies indicating that the Mn4LP2 complex undergoes quasireversible electron transfer in the cathodic potential region and irreversible electron transfer in the anodic potential region. Cu4LP2 complex undergoes irreversible electron transfer in the cathodic potential region, quasireversible electron transfer in the anodic potential region.

Indian Journal of Chemical Technology

Synthesis, spectral and electrochemical studies of novel porphyrin bound tetranuclear acyclic manganese(III) and copper(II) complexes

High-field 31P NMR spectroscopy and single crystal X-ray diffraction studies have been used to study the ring opening and nucleophilic substitution reactions of the λ3-cyclotriphosphazane [EtNPCl]3. The synthesis of the ring opened silicophosphonate [RSi(OH){OP(O)(H)(OH)}]2O (R = (2,6-iPr2C6H3)NSiMe3) (1) represents the first ever molecular silicophosphonate to be isolated bearing free reactive hydroxyl groups. The structure and conformation of the bulky aryloxide substituted λ3-cyclotriphosphazane derivative [EtNP(OAr)]3 (Ar = 2,6-iPr2C6H3) (2) has also been investigated. Interaction of 2 with transition metal precursor complexes leads to the isolation of phosphazane metal complexes with different mode of co-ordination of 2. Further, the reaction of Cp *Ti(OAr)Cl2 (Ar = 2,6-(CH3)2C6H3OH) with O[SiPh2(OH)]2 gave the eight-membered trititanosiloxane [Cp*Ti(Cl) {O(SiPh2O)2SiPh2O} (3). Siloxane chain expansion effects, presumed to be a consequence of ring strain, have beer observed in the product. The presence of reactive Ti-Cl bond in 3 offers opportunities for its reaction chemistry to be explored.

Phosphorus, Sulfur and Silicon and Related Elements

Metal containing new inorganic ring systems based on siloxane and phosphazane frameworks

The reaction of LiGaMe4 with diphenylsilanediol in THF at 50°C leads to the formation of the title gallosiloxane Li2(Li(THF)2)2[Ph2 SiO2GaMe2]2 [Ph2SiO2GaMe(OH)]2·2THF (1), which is made up of a central tetraanionic Ga4Si4O8 16-membered macrocyclic core. The cavity that is created by this tetraanionic gallosiloxane ring and also the presence of two Ga-OH groups pointing toward the center of the macrocyclic ring facilitate the entrapment of two lithium cations in the core through two Li-O(siloxide) and two Li-OH(Ga) linkages. The other two lithium ions are located at the periphery and are bound to the gallosiloxane ring through the Li-O(Si) linkages. Compound 1 represents the first organic-soluble molecular model compound for the S8R secondary building unit of several gallo- and aluminosilicates.

Synthesis and structure of a novel lithium gallosiloxane containing a Ga4Si4O8 macrocycle analogous to the S8R building unit of zeolites

Hydrocarbon-soluble molecular silicophosphonate [RSi(OH){OP(O)(H)(OH)}]2O (R = (2,6-i-Pr2C6H3)NSiMe3) (1) which contains two Si-O-H, two P-O-H, one Si-O-Si, and two Si- O-P linkages is obtained in 35% yield from a direct reaction between RSi(OH)3 and the λ3-cyclotriphosphazane [EtNPCl]3 in the presence of Et3N. The silicophosphonate 1 has been characterized with the aid of IR and NMR (1H, 31P, and 29Si) spectroscopy. A single-crystal X-ray diffraction study reveals that the molecule is built around a HO-P-O-Si(OH)-O-Si(OH)-O-P-OH inorganic backbone. The preliminary investigations indicate that 1 could serve as a useful precursor for the preparation molecular metallosilicophosphonates.

Inorganic Chemistry

Organic soluble silicophosphonate [RSi(OH){OP(O)(H)(OH)}]2O (R = (2,6-i-Pr2C6H3)NSiMe3): The first silicophosphonate containing free Si-OH and P-OH groups