The precise characterization of chemical compounds is fundamental to their successful application in scientific research and industrial processes. 2,6-Dibromoanthraquinone (CAS 633-70-5) is a prime example, and understanding its spectroscopic and structural properties is key to harnessing its potential. NINGBO INNO PHARMCHEM CO.,LTD. provides this critical intermediate, backed by rigorous quality control that ensures well-defined analytical data.

The ultraviolet-visible (UV-Vis) absorption spectrum of 2,6-dibromoanthraquinone reveals significant characteristics. In solution, it typically shows absorption maxima around 350 nm, with a noticeable bathochromic shift compared to unsubstituted anthraquinone. This shift is attributed to the electron-withdrawing nature of the bromine substituents, which modify the electronic structure of the conjugated system. In solid-state measurements, further shifts and broadening of spectral features can occur due to intermolecular interactions, important considerations for its use in thin-film electronic devices.

Infrared (IR) spectroscopy provides vital information about the functional groups present. The characteristic strong absorption bands around 1685 cm⁻¹ correspond to the quinone carbonyl stretching vibrations. The slight increase in frequency compared to unsubstituted anthraquinone indicates the influence of the bromine atoms. Bands in the fingerprint region also confirm the presence of aromatic carbon-bromine bonds, offering definitive structural confirmation.

Nuclear Magnetic Resonance (NMR) spectroscopy is indispensable for elucidating the molecular structure. Proton NMR spectra of 2,6-dibromoanthraquinone display distinct signals for the aromatic protons in characteristic downfield regions, with chemical shifts and coupling patterns that directly correlate to the positions of the bromine substituents and carbonyl groups. Carbon-13 NMR further confirms the carbon framework, with carbonyl carbons appearing significantly downfield and bromine-substituted carbons showing characteristic shifts.

Mass spectrometry, particularly under electron impact (EI) ionization, provides crucial molecular weight information and fragmentation patterns. The molecular ion peak for 2,6-dibromoanthraquinone is typically the base peak, confirming its mass. Characteristic fragmentation pathways involve the sequential loss of carbonyl groups and bromine atoms, offering further structural validation. These fragmentation patterns are consistent with the electron-deficient and halogenated nature of the molecule.

For researchers and manufacturers relying on the precise properties of 2,6-dibromoanthraquinone, access to reliable spectroscopic and structural data is paramount. NINGBO INNO PHARMCHEM CO.,LTD. ensures that its products are well-characterized, supporting the efficient and accurate utilization of this versatile chemical intermediate in various advanced applications, from material science to pharmaceutical research.

NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to supplying 2,6-dibromoanthraquinone that not only meets but exceeds industry purity standards, ensuring that your research and production benefit from clearly defined and consistent chemical properties.