The Pentanoicacid, 2-bromo-3-methyl-, with the CAS registry number 42880-22-8, is also known as 2-Bromo-3-methylvaleric acid. This chemical's molecular formula is C₆H₁₁BrO₂ and molecular weight is 195.05. What's more, its systematic name is 2-Bromo-3-methylpentanoic acid. 

Physical properties of Pentanoicacid, 2-bromo-3-methyl- are: (1)ACD/LogP: 2.26; (2)# of Rule of 5 Violations: 0; (3)ACD/BCF (pH 5.5): 1; (4)ACD/BCF (pH 7.4): 1; (5)ACD/KOC (pH 5.5): 1.42; (6)ACD/KOC (pH 7.4): 1; (7)#H bond acceptors: 2; (8)#H bond donors: 1; (9)#Freely Rotating Bonds: 3; (10)Polar Surface Area: 26.3 Å²; (11)Index of Refraction: 1.485; (12)Molar Refractivity: 39.05 cm³; (13)Molar Volume: 136.1 cm³; (14)Polarizability: 15.48×10^-24 cm³; (15)Surface Tension: 38.7 dyne/cm; (16)Density: 1.432 g/cm³; (17)Flash Point: 99.3 °C; (18)Enthalpy of Vaporization: 52.58 kJ/mol; (19)Boiling Point: 240.5 °C at 760 mmHg; (20)Vapour Pressure: 0.0126 mmHg at 25°C.

Preparation: this chemical can be prepared by 2-amino-3-methyl-pentanoic acid at the ambient temperature. This reaction will need reagents pyridinium polyhydrogen fluoride, KBr and NaNO₂ with the reaction time of 48 hours. The yield is about 80%.

You can still convert the following datas into molecular structure:
(1)SMILES: BrC(C(=O)O)C(C)CC
(2)InChI: InChI=1/C6H11BrO2/c1-3-4(2)5(7)6(8)9/h4-5H,3H2,1-2H3,(H,8,9)
(3)InChIKey: GQZXYZIKUQUVKE-UHFFFAOYSA-N